Inverse-direct magnetocaloric effect crossover in Ni47Mn40Sn12.5Cu0.5 Heusler alloy in cyclic magnetic fields

被引：37

作者：

Gamzatov, A. G. ^{[1
,2
]}

Aliev, A. M. ^{[1
]}

Varzaneh, A. Ghotbi ^{[3
]}

Kameli, P. ^{[3
]}

Sarsari, I. Abdolhosseini ^{[3
]}

Yu, S. C. ^{[2
]}

机构：

[1] RAS, Amirkhanov Inst Phys, DSC, Makhachkala 367003, Russia

[2] Chungbuk Natl Univ, Dept Phys, Cheongju 28644, South Korea

[3] Isfahan Univ Technol, Dept Phys, Esfahan 8415683111, Iran

来源：

APPLIED PHYSICS LETTERS | 2018年 / 113卷 / 17期

基金：

俄罗斯科学基金会;

关键词：

MARTENSITIC-TRANSFORMATION; REFRIGERATION; GIANT;

D O I：

10.1063/1.5049398

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The results of direct studies of the magnetocaloric effect (MCE) of the Ni47Mn40Sn12.5Cu0.5 Heusler alloy in cyclic magnetic fields are presented. It is shown that in cyclic magnetic fields, the MCE value near the magnetostructural phase transition depends on the rate of temperature scanning. A higher rate of change in the sample temperature causes the MCE to have a greater value. The observed effect is explained by irreversible phase transition, induced by a magnetic field, from a low-symmetry martensitic phase to a high-symmetry austenitic phase. Moreover, it is observed only within the temperature hysteresis loop of the magnetostructural phase transition. Such materials, despite the considerable MCE values under a single application of the magnetic field, are unpromising due to a strong change in the magnetocaloric properties in cyclic magnetic fields. Published by AIP Publishing.

引用

页数：5