Crystal orientation dependence of band matching in all-B2-trilayer current-perpendicular-to-plane giant magnetoresistance pseudo spin-valves using Co{sub 2}Fe(Ge{sub 0.5}Ga{sub 0.5}) Heusler alloy and NiAl spacer

Journal Article · Thu May 07 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4915481· OSTI ID:22410008

Chen, Jiamin; Furubayashi, T.; Takahashi, Y. K.; Sasaki, T. T. ^[1]

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1. National Institute for Materials Science, 1-2-1, Sengen, Tsukuba 305-0047 (Japan)

We have experimentally investigated the crystal orientation dependence of band matching in current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) pseudo-spin-valves using Co{sub 2}Fe(Ge{sub 0.5}Ga{sub 0.5}) (CFGG) Heusler alloy ferromagnetic layer and NiAl spacer. The high quality epitaxial CFGG/NiAl/CFGG all-B2-trilayers structure devices were fabricated on both MgO(001) and sapphire (112{sup ¯}0) single crystal substrates to create (001) and (110) crystal orientations. Same magneto-transport properties were observed from these two differently orientated devices indicating that there is no or little orientation dependence of band matching on MR output. We also found that all-B2-trilayer structure was free of lattice matching influence depending on the crystal orientation, which made it a good candidate for CPP-GMR device.

• OSTI ID: 22410008
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
COBALT BASE ALLOYS
CRYSTAL STRUCTURE
EPITAXY
FERROMAGNETIC MATERIALS
FERROMAGNETISM
GALLIUM ALLOYS
GERMANIUM ALLOYS
HEUSLER ALLOYS
INTERMETALLIC COMPOUNDS
LAYERS
MAGNESIUM OXIDES
MAGNETORESISTANCE
MONOCRYSTALS
NICKEL
ORIENTATION
SAPPHIRE
SPACERS
SUBSTRATES