The role of boron on the magneto-caloric effect of FeZrB metallic glasses

被引：37

作者：

Alvarez, Pablo ^{[1
]}

Gorria, Pedro ^{[1
]}

Sanchez Marcos, Jorge ^{[2
]}

Fernandez Barquin, Luis ^{[3
]}

Blanco, Jesus A. ^{[1
]}

机构：

[1] Univ Oviedo, Dept Fis, E-33007 Oviedo, Asturias, Spain

[2] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain

[3] Univ Cantabria, Dept CITIMAC, Santander 39005, Spain

来源：

INTERMETALLICS | 2010年 / 18卷 / 12期

关键词：

magnetic intermetallics; magnetic properties; ambient-temperature uses; magnetic applications; FE-ZR-B-(CU) AMORPHOUS-ALLOYS; NANOCRYSTALLINE MATERIALS; TRANSPORT-PROPERTIES; BCC-FE; FERROMAGNETISM; REFRIGERATION; TEMPERATURE; BEHAVIOR;

D O I：

10.1016/j.intermet.2010.07.018

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Fe-rich FeZrB metallic glasses exhibit magneto-caloric effect (MCE) around room temperature. Amorphous ribbons of two different compositions, Fe(91)Zr(7)B(2) and Fe(88)Zr(8)B(4), with respective Curie temperature values of 230 and 285 K have been studied. Although the maximum magnetic entropy change is relatively moderate (vertical bar Delta S(M)vertical bar(max) similar to 3 J K(-1) Kg(-1) under an applied magnetic field change from 0 to 50 kOe), the MCE spreads over a broad temperature interval (Delta T similar to 200 K), giving rise to a large refrigerant capacity loss (RC similar to 435 J kg(-1)) without any hysteresis. The Curie temperature can be easily tuned between 200 and 350 K by changing the boron content. Therefore, the MCE can be controlled over a wide temperature interval, thus making these amorphous alloys promising candidates for magnetic refrigeration near room temperature. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：2464 / 2467

页数：4

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