Enhancement of spin-asymmetry by L21-ordering in Co2MnSi/Cr/Co2Mnsi current-perpendicular-to-plane magnetoresistance devices
作者： Y. Sakuraba , T. Iwase , K. Saito , S. Mitani , K. Takanashi
DOI: 10.1063/1.3068492
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摘要: Co2MnSi/Cr/Co2MnSi (001)-fully epitaxial current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) devices were fabricated via an UHV magnetron sputtering system. The relationship between the degree of chemical ordering in Co2MnSi (CMS) and CPP-GMR characteristics was investigated systematically against annealing temperature devices. X-ray diffraction profiles reflection high-energy electron images indicated that improved L21-ordering. MR ratio also increased upon maximum 5.2% ΔRA 6.5 mΩ μm2 achieved by at 400 °C. These results indicate promoting L21-ordering CMS enhances bulk and/or interface spin-asymmetry coefficients.
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sci-hub.se 参考文章(17)
Y. Sakuraba, M. Hattori, M. Oogane, Y. Ando, H. Kato, A. Sakuma, T. Miyazaki, H. Kubota, Giant tunneling magnetoresistance in Co2MnSi∕Al–O∕Co2MnSi magnetic tunnel junctions Applied Physics Letters. ,vol. 88, pp. 192508- ,(2006) , 10.1063/1.2202724
T. Furubayashi, K. Kodama, H. Sukegawa, Y. K. Takahashi, K. Inomata, K. Hono, Current-perpendicular-to-plane giant magnetoresistance in spin-valve structures using epitaxial Co2FeAl0.5Si0.5/Ag/Co2FeAl0.5Si0.5 trilayers Applied Physics Letters. ,vol. 93, pp. 122507- ,(2008) , 10.1063/1.2990647
K. Yakushiji, K. Saito, S. Mitani, K. Takanashi, Y. K. Takahashi, K. Hono, Current-perpendicular-to-plane magnetoresistance in epitaxial Co2MnSi∕Cr∕Co2MnSi trilayers Applied Physics Letters. ,vol. 88, pp. 222504- ,(2006) , 10.1063/1.2207987
M. N. Baibich, J. M. Broto, A. Fert, F. Nguyen Van Dau, F. Petroff, P. Etienne, G. Creuzet, A. Friederich, J. Chazelas, Giant magnetoresistance of (001)Fe/(001)Cr magnetic superlattices. Physical Review Letters. ,vol. 61, pp. 2472- 2475 ,(1988) , 10.1103/PHYSREVLETT.61.2472
T. Ishikawa, T. Marukame, H. Kijima, K.-I. Matsuda, T. Uemura, M. Arita, M. Yamamoto, Spin-dependent tunneling characteristics of fully epitaxial magnetic tunneling junctions with a full-Heusler alloy Co2MnSi thin film and a MgO tunnel barrier Applied Physics Letters. ,vol. 89, pp. 192505- ,(2006) , 10.1063/1.2378397
Yuya Sakuraba, Jun Nakata, Mikihiko Oogane, Hitoshi Kubota, Yasuo Ando, Akimasa Sakuma, Terunobu Miyazaki, Fabrication of Co2MnAl Heusler Alloy Epitaxial Film Using Cr Buffer Layer Japanese Journal of Applied Physics. ,vol. 44, pp. 6535- 6537 ,(2005) , 10.1143/JJAP.44.6535
Y. Sakuraba, T. Miyakoshi, M. Oogane, Y. Ando, A. Sakuma, T. Miyazaki, H. Kubota, Direct observation of half-metallic energy gap in Co2MnSi by tunneling conductance spectroscopy Applied Physics Letters. ,vol. 89, pp. 052508- ,(2006) , 10.1063/1.2335583
T. Valet, A. Fert, Theory of the perpendicular magnetoresistance in magnetic multilayers. Physical Review B. ,vol. 48, pp. 7099- 7113 ,(1993) , 10.1103/PHYSREVB.48.7099
J. Mathon, A. Umerski, Theory of tunneling magnetoresistance of an epitaxial Fe/MgO/Fe(001) junction Physical Review B. ,vol. 63, pp. 220403- ,(2001) , 10.1103/PHYSREVB.63.220403
W. H. Butler, X.-G. Zhang, T. C. Schulthess, J. M. MacLaren, Spin-dependent tunneling conductance of Fe | MgO | Fe sandwiches Physical Review B. ,vol. 63, pp. 054416- ,(2001) , 10.1103/PHYSREVB.63.054416