X-ray magnetic circular dichroism at IrL2,3 edges in Fe100-𝑥Ir𝑥 and Co100-𝑥Ir𝑥 alloys: Magnetism of 5d electronic states

Pramana

M Suzuki¹  T Ishikawa1²  V V Krishnamurthy1²  N Kawamura¹ 

[1] Japan Synchrotron Radiation Institute, SPring8, 1-1-1 Kouto, Mikazuki, Hyogo 679-5198, Japan$$;RIKEN Harima Institute, SPring8, 1-1-1 Kouto, Mikazuki, Sayo, Hyogo 679-5148, Japan$$

关键词: Magnetic dichroism;    𝑑 electrons;    magnetic moments.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

The formation of induced 5𝑑 magnetic moment on Ir in Fe100-𝑥Ir𝑥 (𝑥=3, 10 and 17) and Co100-𝑥Ir𝑥 (𝑥=5, 17, 25 and 32) alloys has been investigated by X-ray magnetic circular dichroism (XMCD) at Ir L2,3 absorption edges. Sum rule analysis of the XMCD data show that the orbital moment of Ir is in the range of -0.071(2)𝜇B to -0.030(1)𝜇B in Fe–Ir alloys and -0.067(2)𝜇B to 0.024(1)𝜇B in Co–Ir alloys. We find that the total moment of Ir in Fe–Ir alloys is approximately 1/5 of the total 3𝑑 moment on Fe at all the three compositions. In contrast, the total moment on Ir in Co–Ir alloys varies between 1/6 to 1/16 of the 3𝑑 moment on cobalt. The observed trends of Ir moments and the role of interatomic exchange interactions in 5𝑑 moment formation are discussed.

【 授权许可】

Unknown