Enhanced magnetic entropy in Gd Ni2

N. V. Baranov; A. V. Proshkin; E. G. Gerasimov; A. Podlesnyak; J. Mesot

doi:10.1103/PhysRevB.75.092402

Enhanced magnetic entropy in Gd Ni2

N. V. Baranov
, A. V. Proshkin
, E. G. Gerasimov
, A. Podlesnyak
, J. Mesot

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

Measurements of the specific heat have been performed on Gd1-x Yx Ni2 (x=0,0.2) compounds and their nonmagnetic analogs Lu1-y Yy Ni2, which have similar molar masses. It is found that the difference between the entropies of magnetic and nonmagnetic compounds with identical molar masses surpasses substantially (by 14-19%) the theoretical limit for the magnetic contribution Sm = (1-x) R ln (8) calculated assuming that only Gd ions possess a magnetic moment. This observed enhancement of the magnetic entropy in Gd1-x Yx Ni2 is believed to result from spin fluctuations induced by f-d exchange in the 3d electron subsystem of Ni.

Original language	English
Article number	092402
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	75
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.75.092402
State	Published - Mar 12 2007
Externally published	Yes

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10.1103/PhysRevB.75.092402

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title = "Enhanced magnetic entropy in Gd Ni2",

abstract = "Measurements of the specific heat have been performed on Gd1-x Yx Ni2 (x=0,0.2) compounds and their nonmagnetic analogs Lu1-y Yy Ni2, which have similar molar masses. It is found that the difference between the entropies of magnetic and nonmagnetic compounds with identical molar masses surpasses substantially (by 14-19\%) the theoretical limit for the magnetic contribution Sm = (1-x) R ln (8) calculated assuming that only Gd ions possess a magnetic moment. This observed enhancement of the magnetic entropy in Gd1-x Yx Ni2 is believed to result from spin fluctuations induced by f-d exchange in the 3d electron subsystem of Ni.",

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AU - Baranov, N. V.

AU - Proshkin, A. V.

AU - Gerasimov, E. G.

AU - Podlesnyak, A.

AU - Mesot, J.

PY - 2007/3/12

Y1 - 2007/3/12

N2 - Measurements of the specific heat have been performed on Gd1-x Yx Ni2 (x=0,0.2) compounds and their nonmagnetic analogs Lu1-y Yy Ni2, which have similar molar masses. It is found that the difference between the entropies of magnetic and nonmagnetic compounds with identical molar masses surpasses substantially (by 14-19%) the theoretical limit for the magnetic contribution Sm = (1-x) R ln (8) calculated assuming that only Gd ions possess a magnetic moment. This observed enhancement of the magnetic entropy in Gd1-x Yx Ni2 is believed to result from spin fluctuations induced by f-d exchange in the 3d electron subsystem of Ni.

AB - Measurements of the specific heat have been performed on Gd1-x Yx Ni2 (x=0,0.2) compounds and their nonmagnetic analogs Lu1-y Yy Ni2, which have similar molar masses. It is found that the difference between the entropies of magnetic and nonmagnetic compounds with identical molar masses surpasses substantially (by 14-19%) the theoretical limit for the magnetic contribution Sm = (1-x) R ln (8) calculated assuming that only Gd ions possess a magnetic moment. This observed enhancement of the magnetic entropy in Gd1-x Yx Ni2 is believed to result from spin fluctuations induced by f-d exchange in the 3d electron subsystem of Ni.

UR - https://www.scopus.com/pages/publications/33947099420

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DO - 10.1103/PhysRevB.75.092402

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VL - 75

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 9

M1 - 092402

ER -

Enhanced magnetic entropy in Gd Ni2

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