[19p-P06-1~50] 10 Spintronics and Magnetics (Poster)

[19p-P06-28] Possible site occupation of interstitial carbon in ferrimagnetic Co₂Mn₂C thin film

Prabhat Kumar¹, Parasmani Rajput², Hitoshi Abe³, 〇Shinji Isogami¹ (1.NIMS, 2.RRCAT, 3.KEK)

Keywords:

transition metal carbides,Anomalous Hall effect

The derivation of large anomalous Hall conductivities that cannot be explained by scaling with saturation magnetization has attracted much attention. The values of transition metal nitrides such as Fe₄N and Mn₄N have been known to be relatively large, but from the viewpoint of creating practical light-element spintronics materials, we have expanded the search space to transition metal carbides and found that carbon further increases the anomalous Hall conductivity by a factor of about 10. In order to elucidate the role of this enormous carbon, we first identified preferentially occupied carbon sites by analyzing the X-ray absorption fine structure.