Magnetization, magnetic anisotropy and magnetocaloric effect of the Tb0,2Gd0.8 single crystal in high magnetic fields up to 14 T in region of a phase transition

被引：23

作者：

Nikitin, S. A. ^{[1
]}

Ivanova, T. I. ^{[1
]}

Zvonov, A. I. ^{[1
]}

Koshkid'ko, Yu. S. ^{[2
]}

Cwik, J. ^{[2
]}

Rogacki, K. ^{[2
]}

机构：

[1] Lomonosov Moscow State Univ, Fac Phys, Moscow 119991, Russia

[2] PAS, Inst Low Temp & Struct Res, PL-50950 Wroclaw, Poland

来源：

ACTA MATERIALIA | 2018年 / 161卷

关键词：

Magnetocaloric effect; Magnetocrystalline anisotropy; Single crystals; Rare earth metals; High magnetic fields; REFRIGERATION; GADOLINIUM; ALLOYS;

D O I：

10.1016/j.actamat.2018.09.017

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Tb0.2Gd0.8 single crystal magnetization, magnetic anisotropy and adiabatic temperature change AT dependencies on magnetic field and temperature have been studied in high magnetic fields (up to 14T). In this work, we analyze experimental data within the framework of thermodynamic Landau theory for second order magnetic phase transitions to describe the relationship between the magnetization, adiabatic temperature change Delta T and magnetic field in the region of a phase transition. Moreover, it is proved that the Landau-Ginzburg equations are applicable in the case of high magnetic fields. Furthermore it is discovered that the adiabatic temperature change is proportional to the magnetic field with the relation Delta T-(mu H-0)(2/5) in the region of high magnetic fields. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：331 / 337

页数：7

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