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Author 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  
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  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.  
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  ISSN 0304-8853 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:000254416300060 Approved no  
  Call Number BT @ hernan @ Serial 49  
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Author Tovar, M.; Sereni, J.G.; Pedrazzini, P.; Caneiro, A.; Prado, F.; Butera, A.; Causa, M.T. doi  openurl
  Title Magnetization and specific heat of La doped Sr2FeMoO6 Type Journal Article
  Year 2004 Publication JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS Abbreviated Journal J. Magn. Magn. Mater.  
  Volume 272 Issue Pages 857-858  
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  Abstract We present high-temperature magnetization and low-temperature specific heat measurements performed on the electron doped double perovskite Sr1.7La0.3FeMoO6. We have obtained the electronic contribution to C-p, gamma = 11.5(5) mJ/mol K-2. The electronic susceptibility, derived from the magnetic measurements in the paramagnetic regime (T > T-c = 390K), was chi(e)(0) =(4.9 +/- 1.5) x 10(-4) emu/mol. Anti ferromagnetic coupling between localized and itinerant moments was inferred from the data, with a coupling constant lambda = -(475 +/- 50)mol/emu, that results in a ferromagnetic-like Curie-Weiss susceptibility with Theta = 390(5) K. These results are compared with those obtained for the undoped material. (C) 2003 Published by Elsevier B.V.  
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  Notes ISI:000222236700045 Approved no  
  Call Number BT @ hernan @ Serial 63  
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Author Vildosola, V.L.; Llois, A.M.; Weissmann, M.; Sereni, J.G. doi  openurl
  Title Magnetic behaviour of Ce(Pd1-xMx) compounds (M = Rh, Ni and Ag) within the LDA approximation Type Journal Article
  Year 2001 Publication Journal of Magnetism and Magnetic Materials Abbreviated Journal J. Magn. Magn. Mater.  
  Volume 236 Issue 1-2 Pages 6-8  
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  Abstract Ce intermetallic compounds have been intensively studied in the last few decades due to the large variety of behaviours they exhibit. In particular, two ways of demagnetizing Ce have been experimentally tried within the ferromagnetic systems Ce(Pd1-xMx), namely through electronic concentration variations (M=Rh) and volume reductions (M=Ni). On the other hand, when Pd is substituted by Ag, a transformation from a ferromagnetic to an antiferromagnetic ground state has been observed. In this work, we analyse the evolution of the magnetism of Ce in the above-mentioned family of compounds by calculating the spin contribution to magnetism that results from spin polarised LDA calculations. (C) 2001 Elsevier Science B.V. All rights reserved.  
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  Notes ISI:000171670100004 Approved no  
  Call Number BT @ hernan @ Serial 75  
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Author 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  
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  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.  
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  Notes ISI:A1992JV02200022 Approved no  
  Call Number BT @ hernan @ Serial 111  
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Author Sereni, J.G.; Kappler, J.P. doi  openurl
  Title Magnetic and thermal properties of CeCu Type Journal Article
  Year 1992 Publication Journal of Magnetism and Magnetic Materials Abbreviated Journal J. Magn. Magn. Mater.  
  Volume 109 Issue 2-3 Pages 349-352  
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  Abstract Magnetic susceptibility, high field magnetization and specific heat measurements on CeCu are presented. An antiferromagnetic transition is observed at T(N) = 313 K, with some evidences of low dimensionality of the order parameter. The saturation magnetization. M(s) = 1.16-mu(B), implies that the crystalline electric field (CEF) ground state doublet is strongly magnetic, in agreement with the low temperature Curie constant C = 0.46 emu K/mol. In the high temperature limit (T > 50 K), the obtained Curie constant is C = 0.65 emu K/mol, which suggests an overall CEF splitting larger than 200 K. The entropy gain at the magnetic transition is 72% of the expected R in 2. The missing entropy is related to a specific heat anomaly with a maximum at approximately 13 K, which is attributed to magnetic fluctuations in the Ce chains. The transition temperature and the high temperature broad maximum in the specific heat are weakly affected by an applied magnetic field of 1 T.  
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  Notes ISI:A1992HP06000034 Approved no  
  Call Number BT @ hernan @ Serial 112  
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Author Sereni, J.G.; Trovarelli, O.; Schmerber, G.; Kappler, J.P. doi  openurl
  Title Coexistence of magnetic order and heavy fermion behavior in Ce7X3 Type Journal Article
  Year 1992 Publication Journal of Magnetism and Magnetic Materials Abbreviated Journal J. Magn. Magn. Mater.  
  Volume 108 Issue 1-3 Pages 183-184  
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  Abstract Low temperature specific heat and magnetic susceptibility measurements on Ce7X3 (X = Rh, Ni) compounds are reported. Ce7Rh3 shows an onset of spontaneous magnetization at 7.2 K. About 40% of the expected R ln 2 entropy gain is found in the paramagnetic phase, related to a gamma(HT) = 1.1 J/K2 mol specific heat coefficient. In Ce7Ni3 an antiferromagnetic transition is observed at 1.7 K, superimposed to a large C(p)/T electronic contribution, described by a gamma(HT) = 0.9 J/K2 mol coefficient for T > 10 K. These results are interpreted in terms of the three different crystal sublattices of Ce. The entropy gain related to each transition allows to identify the behaviour of each sublattice. In the case of Ce7Ni3 one sublattice behaves as a heavy fermion system, with a value of C(p)/T = 3.3 J/K2 Ce at. Such a behaviour is confirmed under an applied magnetic field.  
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  Notes ISI:A1992HH32900075 Approved no  
  Call Number BT @ hernan @ Serial 113  
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Author Pureur, P.; Sereni, J.G.; Schaf, J. doi  openurl
  Title Specific heat and magnetic susceptibility in YNd alloys Type Journal Article
  Year 1992 Publication Journal of Magnetism and Magnetic Materials Abbreviated Journal J. Magn. Magn. Mater.  
  Volume 104 Issue 3 Pages 1632-1634  
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  Abstract We report on the specific heat and dc magnetic susceptibility measurements of the YNd 4.5, 6.8 and 9.0 at % alloys. These systems present long-range SDW order just below the critical temperature. For temperatures well below T(C), the spin glass type of behavior is manifest. An interpretation is given in terms of a disorder- and frustration-induced breaking of the SDW coherence into small domains.  
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  Notes ISI:A1992HH32800067 Approved no  
  Call Number BT @ hernan @ Serial 115  
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Author Fraga, G.L.F.; Brandao, D.E.; Sereni, J.G. openurl 
  Title Specific heat of X2MnSn (X = Co, Ni, Pd, Cu), X2MnIn (X = Ni, Pd) and Ni2MnSb Heusler compounds Type Journal Article
  Year 1991 Publication Journal of Magnetism and Magnetic Materials Abbreviated Journal J. Magn. Magn. Mater.  
  Volume 102 Issue 1-2 Pages 199-207  
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  Abstract Results of low-temperature specific heat measurements (1.5-8.0 K) on X2MnSn (X = Co, Ni, Pd, Cu), X2Mnln (X = Ni, Pd) and Ni2MnSb Heusler compounds are presented. All the compounds, except the cobalt based one, exibit a lattice spectrum anomaly described by an Einstein's term (soft-phonons). For all but one compound, the experimental values of the electronic specific heat coefficients are, at least, twice as big as the theoretical estimates. For two compounds it was possible to determine the magnetic effective field on Mn nuclei.  
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  Notes ISI:A1991GX03900034 Approved no  
  Call Number BT @ hernan @ Serial 117  
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Author 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  
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  Notes ISI:A1988T046300057 Approved no  
  Call Number BT @ hernan @ Serial 124  
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Author Sereni, J.G.; Nieva, G.; Kappler, J.P. openurl 
  Title ANOMALOUS CRYSTAL-FIELD EFFECTS IN THE SPECIFIC-HEAT OF CE-HEAVY FERMION COMPOUNDS Type Journal Article
  Year 1987 Publication Journal of Magnetism and Magnetic Materials Abbreviated Journal J. Magn. Magn. Mater.  
  Volume 63-64 Issue Pages 101-103  
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  Notes ISI:A1987G356900031 Approved no  
  Call Number BT @ hernan @ Serial 128  
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