Giant magnetocaloric effects by tailoring the phase transitions

被引：324

作者：

Trung, N. T. ^{[1
]}

Zhang, L. ^{[1
]}

Caron, L. ^{[1
]}

Buschow, K. H. J. ^{[1
]}

Bruck, E. ^{[1
]}

机构：

[1] Delft Univ Technol, Fac Sci Appl, Fundamental Aspects Mat & Energy, NL-2629 JB Delft, Netherlands

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 17期

关键词：

cobalt alloys; ferromagnetic materials; germanium alloys; magnetic transitions; magnetocaloric effects; manganese alloys; refrigerants; solid-state phase transformations; MAGNETIC ENTROPY CHANGE; COXNI1-XMNGE SYSTEM; PRESSURE; TEMPERATURE; MNCO1-XGE;

D O I：

10.1063/1.3399773

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The MnCoGe alloy can crystallize in either the hexagonal Ni(2)In- or the orthorhombic TiNiSi-type of structure. In both phases MnCoGe behaves like a typical ferromagnet with a second-order magnetic phase transition. For MnCoGeB(x) with B on interstitial positions, we discover a giant magnetocaloric effect associated with a single first-order magnetostructural phase transition, which can be achieved by tuning the magnetic and structural transitions to coincide. The results obtained on the MnCoGe-type alloys may be extensible to other types of magnetic materials undergoing a first-order structural transformation and can open up some possibilities for searching magnetic refrigerants for room-temperature applications.

引用

页数：3

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