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Title: 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

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.
Authors:
;  [1] ;  [2] ; ; ;  [1]
  1. National Institute for Materials Science, 1-2-1, Sengen, Tsukuba 305-0047 (Japan)
  2. (Japan)
Publication Date:
OSTI Identifier:
22410008
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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