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Magnetic states of Co and Mn atoms at the Co 2 MnGe / MgO interfaces studied by x-ray absorption spectroscopy and soft x-ray magnetic circular dichroism study
| Content Provider | Semantic Scholar |
|---|---|
| Author | Singh, Vijay Raj Verma, Virendra Kumar Ishigami, Keisuke Yamazaki, Y. Goro Shibata Fujimori, Atsushi Asakura, Daisuke Koide, Tsuneharu Takayuki Ishikawa Yamamoto, M. |
| Copyright Year | 2010 |
| Abstract | Introduction Co-based full Heusler alloys, Co2YZ such as Co2MnGe (CMG) and Co2MnSi (CMS) are promising candidates as ferromagnetic electrodes in magnetic tunnel junctions (MTJ), because theories have predicted that they are perfect half-metals [1]. A numerical study in Ref. 2 suggests that lattice distortions and the existence of impurities at the interfaces make the spin polarization small. Hence, the quality of the interface is a key to obtain higher tunnel magnetoresistance (TMR) ratio, and it is highly important to characterize the interfacial magnetic and electronic states of Heusler alloy/MgO MTJs. In this report, we have studied the magnetic states and the electronic structures of Mn and Co atoms in CMG facing to an MgO barrier by using x-ray absorption spectroscopy (XAS) and soft x-ray magnetic circular dichroism (XMCD). In order to extract the information about the interfacial magnetic and electronic states, we have investigated the film-thickness dependence of XMCD |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://pfwww.kek.jp/acr2009pdf/part_b/pf09b101.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
