抄録
We have studied the structure and magnetoresistive properties of polycrystalline current-perpendicular-to-plane giant magnetoresistance pseudo spin-valves (PSVs) with Co2Mn(Ga0.25Ge0.75) (CMGG) ferromagnetic layers and a Ag spacer. With (110) textured CMGG thin films and (111) textured Ag spacer, the PSVs annealed at 350 °C with 2 nm CoFe buffer layers showed ΔRA of 3.7 m Ω μ m 2 and MR ratio of 12.2%, while the PSVs without the buffer layer showed ΔRA of only 1.3 m Ω μ m 2. High angle angular dark field images showed that the drop of ΔRA by annealing was due to the deterioration of the multi-layer CMGG/Ag/CMGG structure. Energy-dispersive X-ray spectroscopy images further confirmed the interdiffusion between CMGG layer and the Ag layer outside the CMGG/Ag/CMGG trilayer. In addition, we discuss the difference in the magnetoresistive properties of polycrystalline and epitaxial PSVs.
本文言語 | English |
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論文番号 | 053910 |
ジャーナル | Journal of Applied Physics |
巻 | 114 |
号 | 5 |
DOI | |
出版ステータス | Published - 2013 8月 7 |
外部発表 | はい |
ASJC Scopus subject areas
- 物理学および天文学(全般)