Evidence of Coexistence of Ferromagnetic and Antiferromagnetic Phases in Nearly Equiatomic FeRh

被引：2
|
作者：
Kumar, Hardeep [1 ]
Fantini, Marcia C. A. [1 ]
Cornejo, Daniel R. [1 ]
机构：
[1] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo, Brazil
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2013年 / 49卷 / 08期
关键词：
FeRh films; first-order-reversal-curves (FORC) analysis; thermal first-order-reversal-curves; thermal hysteresis;
D O I：
10.1109/TMAG.2013.2262040
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Fe100-xRhx films were deposited on Si substrates with various Rh concentrations (conc.) (x) similar to 32 to 52% at. All the films showed the in-plane magnetic anisotropy due to the thin-film like structure i.e., shape anisotropy. For Rh conc. up to similar to 42% at., the films exhibit a single ferromagnetic (alpha') phase. However, for Rh conc. (x)>42% at., there exists a mixture of ferromagnetic (alpha') and antiferromagnetic (alpha '') phase. Nearly equiatomic samples (x similar to 48 to 52% at.) showed abrupt enhancement in coercivity and a broad thermal hysteresis. This behavior is consistent with the presence of a mixture of FM and AFM phase. Thermal first-order-reversal-curves analysis showed that the AFM to FM phase transition is restricted to a region with FWHM of similar to T = 40 K, in spite of the mentioned broad thermal hysteresis.
引用
收藏
页码：4506 / 4509
页数：4
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