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Title Enhanced spin-valve giant magneto-resistance in non-exchange biased sandwich films
Creator/Author Mao, M ; Cerjan, C ; Law, B ; Grabner, F ; Miloslavsky, L ; Chien, C
Publication Date2000 Feb 17
OSTI IdentifierOSTI ID: 756889
Report Number(s)UCRL-JC-137664; YN0100000
DOE Contract NumberW-7405-ENG-48
Other Number(s)Other: YN0100000; TRN: AH200027%%97
Resource TypeConference
Resource RelationConference: Intermag 2000, Toronto, Ontario (CA), 04/09/2000--04/13/2000; Other Information: PBD: 17 Feb 2000
Research OrgLawrence Livermore National Lab., Livermore, CA (US)
Sponsoring OrgUSDOE Office of Defense Programs (DP) (US)
Subject36 MATERIALS SCIENCE; COMPOSITE MATERIALS; LAYERS; NICKEL ALLOYS; IRON ALLOYS; COBALT ALLOYS; COPPER; MAGNETORESISTANCE; COERCIVE FORCE
Description/AbstractA large giant magnetoresistance (GMR) value of 7.5% has been measured in simple NiFeCo(1)/Cu/NiFeCo(2) sandwich films grown on a 30 {angstrom} Cr seed layer. This spin-valve GMR effect is consistent with the differential switching of the two NiFeCo layers due to an enhanced coercivity of the NiFeCo(1) layer grown on the Cr seed layer. A change in growth texture of the NiFeCo(1) layer from fcc (111) to bcc (110) crystallographic orientation leads to an increase in magnetic anisotropy and an enhancement in coercivity. The GMR value increases to 8.7% when a thin CoFe interfacial enhancing layer is incorporated. Further enhancement in GMR values up to 14% is seen in the sandwich films by nano-oxide layer formation. The specular reflection at oxide/magnetic layer interface further extends the mean free path of spin-polarized electrons.
Country of PublicationUnited States
LanguageEnglish
FormatMedium: ED; Size: 502 Kilobytes pages
System Entry Date2008 Feb 05
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