BT Home

BT Literature Database

Home |  Show All |  Simple Search |  Advanced Search
Quick Search:
1-10 of 21 records found matching your query:
toggle visibility Search & Display Options
Select All    Deselect All << 1 2 3 >>
List View
 | 
Citations
 | 
Details
   print
  Records Links
Author (up) Braghta, A.; Schmerber, G.; Derory, A.; Sereni, J.G.; Kappler, J.P. doi  openurl
  Title Magnetic and thermal properties of Ce2Pd2Sn Type Journal Article
  Year 2008 Publication Journal of Magnetism and Magnetic Materials Abbreviated Journal J. Magn. Magn. Mater.  
  Volume 320 Issue 6 Pages 1141-1145  
  Keywords  
  Abstract X-ray diffraction, susceptibility and specific heat studies on ternary Ce2Pd2Sn intermetallic compound and on its isostructural nonmagnetic compound La2Pd2Sn are reported. On Ce2Pd2Sn in absence of magnetic field, we confirm the existence of two magnetic transitions at T-N = 4.8K (antiferromagnetic transition) and T-C = 2.2K (ferromagnetic transition) and the specific heat results, measured down to 0.5 K, allow to recognize the transition at 2.2K as a first-order transition. A description based on molecular field calculations for the S = 1/2 resonant level model leads to a characteristic Kondo T-K of about 3K. (C) 2007 Elsevier B.V. All rights reserved.  
  Address  
  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 0304-8853 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:000254416300060 Approved no  
  Call Number BT @ hernan @ Serial 49  
Permanent link to this record
 
 
Author (up) Gomez Berisso, M.; Sereni, J.G.; Braghta, A.; Schmerber, G.; Chevalier, B.; Kappler, J.P. url  doi
openurl 
  Title Field suppression of the modulated phase of Ce2Pd2Sn Type Journal Article
  Year 2009 Publication Physica B Abbreviated Journal Proceedings of the International Conference on Strongly Correlated Electron Systems  
  Volume 404 Issue 19 Pages 2930-2933  
  Keywords Magnetic phases; Critical points; Ce2Pd2Sn; Ferromagnetism  
  Abstract Low temperature magnetic (M) and thermal (CP) properties of the intermetallic compound Ce2Pd2Sn have been investigated at zero and different magnetic fields. Two transitions were recognized at and , with latter nearly coinciding with the extrapolated Curie-Weiss temperature . The Curie factor evaluated from T>=TM, is [approximate]2μB. The positive value of θP, the triangular coordination of the magnetic (Ce) atoms and the weak effect of applied magnetic field, reveal that TM cannot be considered as a canonic antiferromagnetic transition like claimed in the literature. M(T) measurements under moderate magnetic fields () show TC(B) increasing while TM(B) is practically not affected. Both transition merge in a critical point at for , where the intermediate phase is suppressed. At , the cusp of a first order transition is observed in CP(T). According to the proposed ferromagnetic ground state, it is followed by a CP(T)[is proportional to]T3/2exp(-Eg/T) dependence, with a gap of anisotropy .  
  Address  
  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 0921-4526 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number BT @ pedrazp @ Serial 562  
Permanent link to this record
 
 
Author (up) Kappler, J.P.; Lehmann, P.; Schmerber, G.; Nieva, G.; Sereni, J.G. doi  openurl
  Title Magnetic properties of the Ce-Rh binary phases Type Journal Article
  Year 1988 Publication Journal de Physique Colloques Abbreviated Journal  
  Volume 49 Issue C8 Pages 721-722  
  Keywords  
  Abstract Crystallographic, magnetic and resistivity studies on the Ce-Rh binary phases clearly define two Ce ground state regions : i) CeRh3, CeRh2 and CeRh as intermediate valence compounds and ii) Ce5Rh4, Ce3Rh2 Ce5Rh3 and Ce7Rh3 with magnetic transitions at low temperature.  
  Address  
  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 0302-0738 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:A1988U701200329 Approved no  
  Call Number BT @ hernan @ Serial 122  
Permanent link to this record
 
 
Author (up) Kappler, J.P.; Schmerber, G.; Sereni, J.G. doi  openurl
  Title Magnetic and thermal properties of Ce5Rh3 Type Journal Article
  Year 1992 Publication Journal of Magnetism and Magnetic Materials Abbreviated Journal J. Magn. Magn. Mater.  
  Volume 115 Issue 2-3 Pages 241-244  
  Keywords  
  Abstract Magnetic susceptibility, high field magnetization and specific heat measurements on Ce5Rh3 are reported. Two antiferromagnetic transitions are observed at T(N)=4.5 K and T(N)'=2.6 K. The magnetization curve at 1.5 K reveals a nontrivial magnetic structure in this compound, with a saturation magnetization of 0.72mu(B). The high temperature Curie constant (0.64 emu K/mol), the Curie-Weiss constant (THETA(p)=-45 K) and the entropy related with the magnetic transitions (DELTAS(m)=0.8 R In 2) indicate the presence of a Kondo-type component in the ground state of Ce5Rh3.  
  Address  
  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 0304-8853 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:A1992JV02200022 Approved no  
  Call Number BT @ hernan @ Serial 111  
Permanent link to this record
 
 
Author (up) KAPPLER, J.P.; SCHMERBER, G.; SERENI, J.G. doi  openurl
  Title CERIUM MAGNETIC-BEHAVIOR IN CE(PD,M) WITH M = CO, NI, RH, IR, PT, CU, AG AND AU Type Journal Article
  Year 1988 Publication Journal of Magnetism and Magnetic Materials Abbreviated Journal J. Magn. Magn. Mater.  
  Volume 76-7 Issue Pages 185-186  
  Keywords  
  Abstract  
  Address  
  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 0304-8853 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:A1988T046300057 Approved no  
  Call Number BT @ hernan @ Serial 124  
Permanent link to this record
 
 
Author (up) KAPPLER, J.P.; SCHMERBER, G.; TROVARELLI, O.; SERENI, J.G. openurl 
  Title HEAVY FERMION AND INTERMEDIATE VALENCE BEHAVIOR IN CE24CO11 Type Journal Article
  Year 1992 Publication JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS Abbreviated Journal  
  Volume 108 Issue 1-3 Pages 185-186  
  Keywords  
  Abstract Low temperature specific heat and magnetic susceptibility measurements on Ce24Co11 are reported. The electronic specific heat can be decomposed into two contributions: a low temperature one (arising at T < 5 K), with a maximum of 2.2 J/K mol at 0.9 K, and another one becoming dominant at T > 5 K, characterized by a gamma(HT) = 1.8 J/K2 mol efficient. The (chi)T product changes continuously with temperature, from 0.48 emu K/mol at 2 K to 7.85 emu K/mol at 200 K. Reminding that 1 mol = 1f.u. contains 24 Ce atoms distributed in ten unequivalent crystalline sites, we interpret the experimental results as due to: one atom which behaves as a heavy fermion, and the rest as intermediate valents, with a distribution of characteristic energies governed by nine different environments. The specific heat behaviour under applied field confirms this interpretation.  
  Address  
  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 0304-8853 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:A1992HH32900076 Approved no  
  Call Number BT @ hernan @ Serial 114  
Permanent link to this record
 
 
Author (up) KAPPLER, J.P.; SCHMERBER, G.; TROVARELLI, O.; SERENI, J.G. doi  openurl
  Title COEXISTENCE OF HEAVY FERMION AND INTERMEDIATE VALENCE BEHAVIOR IN CE24CO11 Type Journal Article
  Year 1992 Publication Zeitschrift für Physik B Condensed Matter Abbreviated Journal Z. Phys. B  
  Volume 86 Issue 2 Pages 253-256  
  Keywords  
  Abstract Low temperature specific heat, magnetic susceptibility and L(III)-XAS measurements on Ce24Co11 are reported. The electronic specific heat can be decomposed into two contributions: a low temperature one (arising at T < 5 K), with a maximum of 2.2 J/Kmole at 0.9 K, and another one becoming dominant at T > 5 K, characterized by a gamma(HT) = 1.8 J/K2mole coefficient. The chi.T product changes continuously with temperature, from 0.48 emu K/mole at 2 K to 7.85 emu K/mole at 200 K. The L(III)-mean valence is upsilon = 3.15. As the 24 Ce atoms are distributed in ten unequivalent crystalline sites, we interpret the experimental results as due to: one atom which behaves as a Heavy Fermion and the rest as Kondo and Intermediate Valent, with a distribution of characteristic energies governed by nine different environments. Qualitatively, the specific heat behaviour under applied field and the upsilon = 3.15 value are in agreement with this interpretation.  
  Address  
  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 0722-3277 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:A1992HD31000014 Approved no  
  Call Number BT @ hernan @ Serial 116  
Permanent link to this record
 
 
Author (up) NIEVA, G.L.; SERENI, J.G.; AFYOUNI, M.; SCHMERBER, G.; KAPPLER, J.P. openurl 
  Title FROM FERROMAGNETIC TO NON-MAGNETIC SINGLET GROUND-STATE IN CEPD1-XNIX Type Journal Article
  Year 1988 Publication Zeitschrift für Physik B Condensed Matter Abbreviated Journal Z. Phys. B  
  Volume 70 Issue 2 Pages 181-186  
  Keywords  
  Abstract  
  Address  
  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 0722-3277 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:A1988M112900008 Approved no  
  Call Number BT @ hernan @ Serial 126  
Permanent link to this record
 
 
Author (up) Pedrazzini, P.; Schmerber, G.; Berisso, M.G.; Kappler, J.P.; Sereni, J.G. openurl 
  Title Magnetic and superconducting properties of A(7)B(3) compounds (A = Th or La and B=Ni, Co, Fe or Pd, Rh, Ru) Type Journal Article
  Year 2000 Publication PHYSICA C Abbreviated Journal  
  Volume 336 Issue 1-2 Pages 10-18  
  Keywords  
  Abstract High-temperature magnetization, low temperature specific heat, and ac-susceptibility measurements on Th7X3 (X = Ni, Co, and Fe) and La(7)Z(3) (Z = Pd, Rh, and Ru) superconductors are presented. The magnetic behaviour of the Th7X3 group has the characteristics of Pauli paramagnets. The La(7)Z(3) group also shows Pauli paramagnetism for Z = Pd and Ru, and signs of spin fluctuations for La7Rh3. Specific heat (C-p) measurements indicate a conventional BCS behaviour for La7Pd3 and La7Rh3, like that of the previously measured Th7X3 superconductors. in the case of La7Ru3, the reduced specific heat jump at the transition, the anomalous temperature dependence of C-p under magnetic field and a large upper critical field slope are discussed. (C) 2000 Elsevier Science B.V. All rights reserved.  
  Address  
  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 0921-4534 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:000088047500002 Approved no  
  Call Number BT @ hernan @ Serial 78  
Permanent link to this record
 
 
Author (up) Sereni, J.G.; Nieva, G.L.; Schmerber, G.; Kappler, J.P. doi  openurl
  Title EVIDENCES FOR UNCONVENTIONAL SUPERCONDUCTIVITY IN RARE-EARTH INTERMETALLICS Type Journal Article
  Year 1989 Publication Modern Physics Letters B Abbreviated Journal Mod. Phys. Lett. B  
  Volume 3 Issue 16 Pages 1225-1231  
  Keywords  
  Abstract The specific heat of CeRu2 and La5Rh4 of the superconducting state does not follow a BCS-exponential temperature dependence, but a T2 law. At very low temperature (T = 0.1 Tc), CeRu2 shows a linear T dependence, which corresponds to a constant density of states. The experimental results are well described by the theoretical predictions for an axial state (CeRu2) and polar state (La5Rh4) superconductors. The small Sommerfeld coefficient of La5Rh4(? = 3.4 mJ/K2 La at.) excludes this compound from the heavy fermion superconductors.  
  Address  
  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 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number BT @ gnieva @ Serial 428  
Permanent link to this record
Select All    Deselect All << 1 2 3 >>
List View
 | 
Citations
 | 
Details
   print
toggle visibility
Save Citations:
Export Records:
Home CQL Search  |  Library Search  |  Show Record  |  Extract Citations Help