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Author Encina, S.; Pedrazzini, P.; Sereni, J.G.; Geibel, C. url  doi
openurl 
  Title Low temperature thermopower and magnetoresistance of Sc-rich CeSc1-xTixGe Type Journal Article
  Year 2018 Publication Physica B: Condensed Matter Abbreviated Journal Physica B  
  Volume 536 Issue Pages 133-136  
  Keywords CeScGe; CeTiGe; Antiferromagnetism; Transport properties; Low temperatures; Magnetic field  
  Abstract In CeSc1-xTixGe, Ti-alloying reduces the record-high antiferromagnetic (AFM) ordering temperature found in CeScGe at TN=46K and induces ferromagnetism for x≥0.5. In this work we focus on the AFM side, i.e. Sc-rich samples, and study their thermopower S(T) and magnetoresistance ρ(H,T). The measured S(T) is small in comparison with the thermopower of other Ce-systems and shows some features that are compatible with a weak hybridization between the 4f and band states. This is a further hint pointing to the local character of magnetism in this alloy. Magnetic fields up to 16T have a minor effect on the electrical resistivity of stoichiometric CeScGe. On the other hand, for x=0.65, we find that fields above 4T suppress the hump in ρ(T). Furthermore, the 4.2K magnetoresistance displays a strong decrease in the same field range, also in coincidence with magnetization results from the literature. Our results indicate that ρ(T,H) is a proper tool to assess the H−T phase diagram of this system.  
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  Series Volume Series Issue Edition  
  ISSN 0921-4526 ISBN Medium  
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  Call Number BT @ pedrazp @ Serial 765  
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Author Deppe, M.; Caroca-Canales, N.; Sereni, J.G.; Geibel, C. url  doi
openurl 
  Title Evidence for a metamagnetic transition in the heavy Fermion system CeTiGe Type Conference Article
  Year 2010 Publication Journal of Physics: Conference Series Abbreviated Journal J. Phys.: Conf. Ser.  
  Volume 200 Issue Pages 012026  
  Keywords Applied magnetic fields; Canonical systems; Continuous suppression; Critical behavior; Critical fields; DC magnetization; First order; Heavy fermion systems; Higher temperatures; Low temperatures; Metamagnetic; Metamagnetic transitions; Polycrystalline; Cerium; Cerium compounds; Electric resistance; Magnetic field effects; Magnetoresistance; Magnetism  
  Abstract A recent study of CeTiGe identified this compound as a paramagnetic heavy Fermion system where the full J = 5/2 multiplet is involved in the formation of the ground state. Here we present a preliminary investigation of the dc-magnetization Mdc(H) and of the magnetoresistance ρ(H) of polycrystalline CeTiGe samples in applied magnetic fields up to μ0H = 14 T. The results reveal a pronounced metamagnetic transition at a critical field μ0Hc ≈ 13.5 T at low temperatures, with a step like increase in Mdc(H) of at least 0.6 μB/Ce. The metamagnetic transition leads to a strong decrease in ρ(H). A clear hysteresis in Mdc(H) and ρ(H) indicate that in CeTiGe these metamagnetic features correspond to a true thermodynamic, first order type transition in contrast to the critical behavior observed in the canonical system CeRu2Si2. Measurements at higher temperatures showed a continuous suppression of the metamagnetic transition with increasing T, which vanishes at T ∼ 30 K. © 2010 IOP Publishing Ltd.  
  Address (up)  
  Corporate Author Thesis  
  Publisher Place of Publication Karlsruhe Editor  
  Language Summary Language Original Title  
  Series Editor Series Title International Conference on Magnetism, ICM 2009 Abbreviated Series Title  
  Series Volume 200 Series Issue SECTION 1 Edition  
  ISSN 17426588 (ISSN) ISBN Medium  
  Area Expedition Conference  
  Notes Conference code: 81773; Export Date: 10 December 2010; Source: Scopus; Art. No.: 012026; doi: 10.1088/1742-6596/200/1/012026; Language of Original Document: English; Correspondence Address: Deppe, M.; Max Planck Institute for Chemical Physics of Solids, D-01187 Dresden, Germany; email: Hicha.Deppe@cpfs.mpg.de; References: Gegenwart, P., Si, Q., Steglich, F., (2008) Nature Phys., 4 (3), p. 186; Sachdev, S., (2008) Nature Phys., 4 (3), p. 173; Blundell, S., (2001) Oxford Master Series in Condensed Matter Physics, , (Oxford University Press); Monthoux, P., Lonzarich, G.G., (2001) Phys. Rev., 63 (5), p. 054529; Morozkin, A.V., Seropegin Yu, D., Leonov, A.V., Sviridov, I.A., Tskhadadze, I.A., Nikitin, S.A., (1998) J. Alloys Comput., 267, pp. 14-15R; Welter, R., Vernière, A., Venturini, G., Malaman, B., (1999) J. Alloys. Compounds, 283 (1-2), p. 54; Deppe, M., Caroca-Canales, N., Hartmann, S., Oeschler, N., Geibel, C., (2009) J. Phys.: Condens. Matter, 21 (20), p. 206001; Hewson, A.C., (1993) The Kondo Problem to Heavy Fermions (Cambridge Studies in Magnetism), 2. , ed D Edwards and D Melville (Cambridge: Cambridge University press); Haen, P., Flouquet, J., Lapierre, F., Lejay, P., Remenyi, G., (1987) J. Low Temp. Phys., 67 (5-6), p. 391; Sakakibara, T., Tayama, T., Matamura, K., Maezawa, K., Onuki, Y., Amitsuka, H., (1995) Phys. Rev., 51 (17), p. 12030; Andreev, A.V., Vejpravov, J., ProkleÅ¡ka, J., Sechovsky, V., (2008) Physica, 403 (5-9), p. 744 Approved no  
  Call Number BT @ berisso @ Serial 599  
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Author Franco, D.G.; Carbonio, R.E.; Nieva, G. doi  openurl
  Title Change in the Magnetic Domain Alignment Process at the Onset of a Frustrated Magnetic State in Ferrimagnetic La2Ni(Ni1/3Sb2/3)O6 Double Perovskite Type Journal Article
  Year 2013 Publication IEEE Transactions on Magnetics Abbreviated Journal IEEE Trans. Magn.  
  Volume 49 Issue 8 Pages 4656-4659  
  Keywords coercive force; exchange interactions (electron); ferrimagnetic materials; frustration; magnetic domain walls; magnetic hysteresis; magnetic transitions; LaNi(Ni0.33Sb0.67)O6; applied magnetic field; coercive field; domain wall pinning; ferrimagnetic double perovskite; ferrimagnetic order transition; frustrated magnetic state; hysteresis data; low temperature regime; magnetic domain alignment process; magnetic exchange interactions; magnetization hysteresis loops; temperature dependence; Magnetic domain walls; Magnetic domains; Magnetic hysteresis; Magnetization; Nickel; Temperature distribution; Temperature measurement; Ferrimagnetic materials; magnetic analysis; magnetic domain walls; magnetic hysteresis  
  Abstract We have performed a combined study of magnetization hysteresis loops and time dependence of the magnetization in a broad temperature range for the ferrimagnetic La2Ni(Ni1/3Sb2/3)O6 double perovskite. This material has a ferrimagnetic order transition at ~100 K and at lower temperatures (~20 K) shows the signature of a frustrated state due to the presence of two competing magnetic exchange interactions. The temperature dependence of the coercive field shows an important upturn below the point where the frustrated state sets in. The use of hysteresis data, magnetization versus applied magnetic field, together with the magnetization versus time data provides a unique opportunity to distinguish between different scenarios for the low temperature regime. From our analysis, a strong domain wall pinning results in the best scenario for the low temperature regime. For temperatures larger than 20 K, the adequate scenario seems to correspond to a weak domain wall pinning.  
  Address (up)  
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  Series Editor Series Title Abbreviated Series Title  
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  ISSN 0018-9464 ISBN Medium  
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  Call Number BT @ pedrazp @ Serial 668  
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Author Rodr url  openurl
  Title Role of anisotropy in the vortex lattice of superconductors high-Q oscillator measurements in 2H-NbSe2 and La1.825Sr0.075CuO4 Type Journal Article
  Year 1994 Publication Physica C: Superconductivity and its applications Abbreviated Journal Phys C Supercond Appl  
  Volume 229 Issue 1-2 Pages 59-64  
  Keywords Anisotropy; Copper oxides; High temperature superconductors; Lanthanum compounds; Magnetic field effects; Niobium compounds; Oscillators (mechanical); Phase transitions; Superconductivity; Thickness measurement; Angular dependence; Ginzburg Landau theory; Pinning; Crystal lattices  
  Abstract Measurement of the response of the flux-line lattice in NbSe2 and La1.825Sr0.075CuO4 show important differences between these two materials. In particular, we have studied the magnetic-field and angular dependence of the response of a high-Q mechanical oscillator in fields of up to 1 T. The features seen in NbSe2 seem to be well explained in terms of a change in the pinning regime, usually termed the “peak effect” in the critical current, using the collective-pinning model of Larkin and Ovchivnikov within Ginzburg-Landau anisotropic theory. On the other hand the behavior found in the high-Tc material LSCO seems to fall naturally into a description which takes into account the possibility of phase transitions in the vortex lattice and the quasi-two-dimensional character of the superconductivity.  
  Address (up) AT and T Bell Laboratories, Murray hill, NJ 07974, USA  
  Corporate Author Thesis  
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  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 09214534 (ISSN) ISBN Medium  
  Area Expedition Conference  
  Notes Cited By (since 1996): 2; Export Date: 28 April 2009; Source: Scopus; CODEN: PHYCE; Language of Original Document: English; Correspondence Address: Luzuriaga, J.; Comisi Approved no  
  Call Number BT @ luzuriag @ Serial 484  
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Author Rodr url  openurl
  Title Role of anisotropy in the vortex lattice of superconductors high-Q oscillator measurements in 2H-NbSe2 and La1.825Sr0.075CuO4 Type Journal Article
  Year 1994 Publication Physica C: Superconductivity and its applications Abbreviated Journal Phys C Supercond Appl  
  Volume 229 Issue 1-2 Pages 59-64  
  Keywords Anisotropy; Copper oxides; High temperature superconductors; Lanthanum compounds; Magnetic field effects; Niobium compounds; Oscillators (mechanical); Phase transitions; Superconductivity; Thickness measurement; Angular dependence; Ginzburg Landau theory; Pinning; Crystal lattices  
  Abstract Measurement of the response of the flux-line lattice in NbSe2 and La1.825Sr0.075CuO4 show important differences between these two materials. In particular, we have studied the magnetic-field and angular dependence of the response of a high-Q mechanical oscillator in fields of up to 1 T. The features seen in NbSe2 seem to be well explained in terms of a change in the pinning regime, usually termed the “peak effect” in the critical current, using the collective-pinning model of Larkin and Ovchivnikov within Ginzburg-Landau anisotropic theory. On the other hand the behavior found in the high-Tc material LSCO seems to fall naturally into a description which takes into account the possibility of phase transitions in the vortex lattice and the quasi-two-dimensional character of the superconductivity.  
  Address (up) AT and T Bell Laboratories, Murray hill, NJ 07974, USA  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 09214534 (ISSN) ISBN Medium  
  Area Expedition Conference  
  Notes Cited By (since 1996): 2; Export Date: 28 April 2009; Source: Scopus; CODEN: PHYCE; Language of Original Document: English; Correspondence Address: Luzuriaga, J.; Comisi Approved no  
  Call Number BT @ luzuriag @ Serial 520  
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Author Herbsommer, J.A.; Luzuriaga, J.; Cheong, S.-W. url  doi
openurl 
  Title Vortex glass melting in single crystal La1.825 Sr0.075CuO4 Type Journal Article
  Year 1996 Publication Physica C Abbreviated Journal Physica C  
  Volume 258 Issue 1-2 Pages 169-174  
  Keywords Copper compounds; Crystal lattices; Frequency response; Glass; Magnetic field measurement; Magnetic permeability measurement; Melting; Phase diagrams; Single crystals; Temperature; Vortex flow; AC susceptibility; Cuprates; Pinned flux lattice; Oxide superconductors  
  Abstract The vortex phase diagram in single crystalline La1.85Sr0.075CuO4 has been studied using an AC-susceptibility technique. A peak in the out-of-phase (x?) component of the susceptibility indicates a transition from a pinned flux lattice (FLL) to an unpinned one. This peak is frequency dependent for all the values of the magnetic field measured (0.01 to 4 T), and this, as well as the general behavior found in the cuprates, has prompted us to interpret our data as evidence for a vortex-glass to liquid transition in the FLL. The activation energies obtained can be fitted to a theory developed by Vinokur et al. Measurements with the magnetic field at an angle with the Cu-O planes may also be understood qualitatively within this framework.  
  Address (up) AT and T Bell Laboratories, Murray Hill, NJ, United States  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 09214534 (ISSN) ISBN Medium  
  Area Expedition Conference  
  Notes Cited By (since 1996): 2; Export Date: 28 April 2009; Source: Scopus; CODEN: PHYCE; doi: 10.1016/0921-4534(95)00812-8; Language of Original Document: English; Correspondence Address: Luzuriaga, J.; Centro At Approved no  
  Call Number BT @ luzuriag @ Serial 483  
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Author Maiorov, B.; Osquiguil, E. url  openurl
  Title Bose-glass-like phases in oriented-twin YBa2Cu3O7-? crystals Type Journal Article
  Year 2004 Publication Journal of Low Temperature Physics Abbreviated Journal J. Low Temp. Phys.  
  Volume 135 Issue 1-2 Pages 131-134  
  Keywords Low temperature effects; Magnetic fields; Superconducting materials; Bose-glass phases; Planar random defect array; Yttrium barium copper oxides; physics  
  Abstract We experimentally study the dynamical response of the superconducting vortex system near the solid-liquid transition by applying forces parallel and perpendicular to a planar random defect array. Our results show that for magnetic fields above a certain critical field Hcr'? 4 T the solid glassy vortex phase in YBa2Cu3O7-? crystals with oriented twin planes does not correspond to the so-called Bose-glass phase.  
  Address (up) Centro At  
  Corporate Author Thesis  
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  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 00222291 (ISSN) ISBN Medium  
  Area Expedition Conference  
  Notes Cited By (since 1996): 1; Export Date: 17 April 2009; Source: Scopus; CODEN: JLTPA; Language of Original Document: English; Correspondence Address: Maiorov, B.; Superconductivity Technology Center; Los Alamos Laboratory Los Alamos, NM 87545, United States; References: Crabtree, G., Nelson, D.R., (1997) Phys. Today, 50, p. 38. , and references therein; Nelson, D.R., Vinokur, V.M., (1993) Phys. Rev. Lett., 68, p. 2398. , J. Lidmar and M. Wallin, Europhys. Lett. 47, 494 (1999); Grigera, S.A., (1998) Phys. Rev. Lett., 81, p. 2348; Maiorov, B., Osquiguil, E., (2001) Phys. Rev. B, 64, p. 052511; Maiorov, B., Nieva, G., Osquiguil, E., (2000) Phys. Rev. B., 61, p. 12427; Grigera, S.A., (2001) Phys. Rev. B., 63, p. 212509 Approved no  
  Call Number BT @ osquigui @ Serial 367  
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Author Maiorov, B.; Silhanek, A.V.; De la Cruz, F.; Osquiguil, E.; Rydh, A.; Rapp, url  openurl
  Title Comment on “strong vortex liquid correlation from multiterminal measurements on untwinned YBa2Cu3O7-? single crystals” [2] (multiple letters) Type Journal Article
  Year 2002 Publication Physical Review Letters Abbreviated Journal Phys Rev Lett  
  Volume 88 Issue 13 Pages  
  Keywords Current voltage characteristics; Electric potential; Extrapolation; Magnetic fields; Melting; Twinning; Vortex flow; Yttrium barium copper oxides; Multiterminal measurements; Single crystals  
  Abstract  
  Address (up) Centro At  
  Corporate Author Thesis  
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  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 00319007 (ISSN) ISBN Medium  
  Area Expedition Conference  
  Notes Export Date: 17 April 2009; Source: Scopus; CODEN: PRLTA; Language of Original Document: English; Correspondence Address: Maiorov, B.; Centro At Approved no  
  Call Number BT @ osquigui @ Serial 369  
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Author Maiorov, B.; Osquiguil, E. url  openurl
  Title Vortex solid state in YBa2Cu3O7-? twinned crystals Type Journal Article
  Year 2001 Publication Physical Review B – Condensed Matter and Materials Physics Abbreviated Journal Phys. Rev. B Condens. Matter Mater. Phys.  
  Volume 64 Issue 5 Pages 0525111-0525114  
  Keywords barium; copper derivative; yttrium; article; conductor; crystal; high temperature procedures; magnetic field; mathematical analysis; melting point; solid state; temperature; thermodynamics  
  Abstract We report on the scaling of transport properties around the vortex melting in YBa2Cu3O7-? oriented-twin single crystals in applied magnetic fields between 1 T and 18 T. We find that for the whole measured field range the linear resistivity scales as ?(t,?)?tsyF  
  Address (up) Centro At  
  Corporate Author Thesis  
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  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 01631829 (ISSN) ISBN Medium  
  Area Expedition Conference  
  Notes Cited By (since 1996): 6; Export Date: 17 April 2009; Source: Scopus; Art. No.: 052511; CODEN: PRBMD; Language of Original Document: English; Correspondence Address: Maiorov, B.; Centro At Approved no  
  Call Number BT @ osquigui @ Serial 371  
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Author Decca, R.S.; Drew, H.D.; Osquiguil, E.; Maiorov, B.; Guimpel, J. openurl 
  Title Anomalous proximity effect in underdoped YBa2Cu3O6+x Josephson junctions Type Journal Article
  Year 2000 Publication Physical Review Letters Abbreviated Journal Phys Rev Lett  
  Volume 85 Issue 17 Pages 3708-3711  
  Keywords Critical currents; Energy gap; High temperature superconductors; Magnetic field effects; Magnetron sputtering; Mathematical models; Phase diagrams; Phase transitions; Physical properties; Scanning electron microscopy; Superconductivity; Yttrium barium copper oxides; Anomalous proximity effect; Fluctuating phase models; Josephson effect; Photodoping; Josephson junction devices  
  Abstract Experiments were carried out to probe the underdoped insulating material by the Josephson effect. Junctions were fabricated by exploiting the capability of locally photodoping insulating RBa2Cu3O6+x (R = rare earth) material. The existence of an anomalously large proximity effect was confirmed. The critical current of the junctions was consisted with the conventional Josephson relationship.  
  Address (up) Centro At  
  Corporate Author Thesis  
  Publisher American Inst of Physics Place of Publication Woodbury, NY, United States Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 00319007 (ISSN) ISBN Medium  
  Area Expedition Conference  
  Notes Cited By (since 1996): 36; Export Date: 17 April 2009; Source: Scopus; CODEN: PRLTA; doi: 10.1103/PhysRevLett.85.3708; Language of Original Document: English; Correspondence Address: Decca, R.S.; Univ of Maryland College Park, United States; References: Ginsberg, D.M., (1996) Physical Properties of High Temperature Superconductors V, , World Scientific, Singapore; Zhang, S.C., (1997) Science, 275, p. 1089; Emery, V.J., Kivelson, S.A., (1995) Nature (London), 374, p. 434; Corson, J., (1999) Nature (London), 398, p. 291; Renner, Ch., (1998) Phys. Rev. Lett., 80, p. 149; Demler, E., (1998) Phys. Rev. Lett., 80, p. 2917; Den Hertog, B.C., Berlinsky, A.J., Kallin, C., (1999) Phys. Rev. B, 59, pp. R11645; Emery, V.J., Kivelson, S.A., Zachar, O., (1997) Phys Rev. B, 56, p. 6120; Tinkham, M., (1996) Introduction to Superconductivity, , McGraw-Hill, New York; Decca, R.S., (1998) Appl. Phys. Lett., 73, p. 120; (1999) J. Microsc., 194, p. 407; Osquiguil, E., (1992) Appl. Phys. Lett., 60, p. 1627; Kudinov, V.I., (1993) Phys. Rev. B, 47, p. 9017; Decca, R.S., Drew, H.D., Empson, K.L., (1997) Appl. Phys. Lett., 70, p. 1932; Orenstein, J., (1990) Phys. Rev. B, 42, p. 6342; Nieva, G., (1992) Appl. Phys. Lett., 60, p. 2159; (1992) Phys. Rev. B, 46, p. 14249; notenoteGray, K.E., (1992) Phys. Rev. B, 45, p. 10071; Pauza, A.J., (1997) J. Appl. Phys., 82, p. 5612; Katz, A.S., Woods, S.I., Dynes, R.C., (2000) J. Appl. Phys., 87, p. 2978; noteUR – http://www.scopus.com/scopus/inward/record.url?eid=2-s2.0-19244384844&partnerID=40 Approved no  
  Call Number BT @ osquigui @ Serial 373  
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