Spin Fluctuations Drive the Inverse Magnetocaloric Effect in Mn5Si3

被引：36

作者：

Biniskos, N. ^{[1
,2
]}

Schmalzl, K. ^{[1
]}

Raymond, S. ^{[2
]}

Petit, S. ^{[3
]}

Steffens, P. ^{[4
]}

Persson, J. ^{[5
,6
]}

Brueckel, T. ^{[5
,6
,7
]}

机构：

[1] Forschungszentrum Julich, Julich Ctr Neutron Sci ILL, 71 Ave Martyrs, F-38000 Grenoble, France

[2] Univ Grenoble Alpes, CEA, INAC, MEM, F-38000 Grenoble, France

[3] Univ Paris Saclay, CNRS, CE Saclay, Lab Leon Brillouin,CEA, F-91191 Gif Sur Yvette, France

[4] Inst Laue Langevin, 71 Ave Martyrs, F-91191 Gif Sur Yvette, France

[5] Forschungszentrum Julich, Julich Ctr Neutron Sci JCNS 2, D-52425 Julich, Germany

[6] Peter Grunberg Inst PGI 4, JARS FIT, D-52425 Julich, Germany

[7] Forschungszentrum Julich, Julich Ctr Neutron Sci MLZ, Lichtenbergstr 1, D-85748 Garching, Germany

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 120卷 / 25期

关键词：

MAGNETIC-PHASE-TRANSITIONS;

D O I：

10.1103/PhysRevLett.120.257205

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Inelastic neutron scattering measurements are performed on single crystals of the antiferromagnetic compound Mn5Si3 in order to investigate the relation between the spin dynamics and the magneto-thermodynamics properties. It is shown that, among the two stable antiferromagnetic phases of this compound, the high temperature one has an unusual magnetic excitation spectrum where propagative spin waves and diffuse spin fluctuations coexist. Moreover, it is evidenced that the inverse magnetocaloric effect of Mn5Si3 , the cooling by adiabatic magnetization, is associated with field induced spin fluctuations.

引用

页数：6

共 32 条

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[Anonymous], 2006, Neutron Scattering from Magnetic Materials

[2] Geometric frustration in Rare Earth antiferromagnetic compounds [J].