Compressibility Anomaly in Magnetic Heuslar Alloy Ni2MnGa and Co2FeSi

被引：0

作者：

Garg, Alka B. ^{[1
]}

Vijayakumar, V. ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, High Pressure & Synchrotron Radiat Phys Div, Bombay 400085, Maharashtra, India

来源：

SOLID STATE PHYSICS: PROCEEDINGS OF THE 55TH DAE SOLID STATE PHYSICS SYMPOSIUM 2010, PTS A AND B | 2011年 / 1349卷

关键词：

High pressure; XRD; Heuslar alloy; Bulk modulus;

D O I：

10.1063/1.3605776

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Results of synchrotron based high pressure x ray diffraction measurements on Heuslar alloys Ni2MnGa and Co2FeSi are reported up to 30.6 and 24.6 GPa respectively. Pressure volume data for Ni2MnGa shows normal compressibility behaviour up to 30.6 GPa with the value of bulk modulus Bo and its pressure derivative B' as 130 GPa and 4.97 respectively. In case of Co2FeSi, the P-V data shows normal behaviour upto 5 Gpa and hereafter linear P-V relation. The estimated ambient pressure compressibility based on data up to 5 GPa is 267 GPa (with B'=4). The fit to linear P-V data above 5 GPa yields a compressibility of 279.5.

引用

页码：139 / 140

页数：2

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