MAGNETORESISTANCE AND EXCHANGE EFFECTS OF NICO/CU SANDWICH FILMS WITH OXIDE OVERLAYER

被引:4
作者
MCGUIRE, TR
PLASKETT, TS
机构
[1] IBM Research Division, T. J. Watson Research Center, Yorktown Heights
关键词
D O I
10.1063/1.356940
中图分类号
O59 [应用物理学];
学科分类号
摘要
Giant magnetoresistance (GMR) of 8% at 4.2 K is found in sandwich films having the composition Ni0.7Co0.3(50 angstrom)/Cu(t)/NiCo(50 angstrom)/NiCoO(40 angstrom) where NiCoO is a mixed oxide overlayer that exchange couples with the NiCo alloy layer. These films show a MR temperature dependence quite similar to that previously reported for Co/Cu/Co/CoO where the MR becomes small above 200 K. When bilayers of CoO/NiO are placed on the NiCo layer, the temperature dependence of MR extends to 250 K. The magnitude of the MR at 4.2 K scales with the magnitude of the saturation magnetization in the NiCo and Co films.
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页码:6537 / 6539
页数:3
相关论文
共 8 条
[1]   GIANT MAGNETORESISTANCE OF (001)FE/(001) CR MAGNETIC SUPERLATTICES [J].
BAIBICH, MN ;
BROTO, JM ;
FERT, A ;
VANDAU, FN ;
PETROFF, F ;
EITENNE, P ;
CREUZET, G ;
FRIEDERICH, A ;
CHAZELAS, J .
PHYSICAL REVIEW LETTERS, 1988, 61 (21) :2472-2475
[2]   COO-NIO SUPERLATTICES - INTERLAYER INTERACTIONS AND EXCHANGE-ANISOTROPY WITH NI81FE19 [J].
CAREY, MJ ;
BERKOWITZ, AE .
JOURNAL OF APPLIED PHYSICS, 1993, 73 (10) :6892-6897
[3]   GIANT MAGNETORESISTANCE IN SOFT FERROMAGNETIC MULTILAYERS [J].
DIENY, B ;
SPERIOSU, VS ;
PARKIN, SSP ;
GURNEY, BA ;
WILHOIT, DR ;
MAURI, D .
PHYSICAL REVIEW B, 1991, 43 (01) :1297-1300
[4]   MAGNETOTRANSPORT PROPERTIES OF MAGNETICALLY SOFT SPIN-VALVE STRUCTURES [J].
DIENY, B ;
SPERIOSU, VS ;
METIN, S ;
PARKIN, SSP ;
GURNEY, BA ;
BAUMGART, P ;
WILHOIT, DR .
JOURNAL OF APPLIED PHYSICS, 1991, 69 (08) :4774-4779
[5]   EFFECTIVENESS OF ANTIFERROMAGNETIC OXIDE EXCHANGE FOR SANDWICH LAYERS [J].
MCGUIRE, TR ;
PLASKETT, TS ;
GAMBINO, RJ .
IEEE TRANSACTIONS ON MAGNETICS, 1993, 29 (06) :2714-2716
[6]   MAGNETIZATION AND MAGNETORESISTANCE OF CO/CU LAYERED FILMS [J].
MCGUIRE, TR ;
PLASKETT, TS .
IEEE TRANSACTIONS ON MAGNETICS, 1992, 28 (05) :2748-2750
[7]   OSCILLATORY MAGNETIC EXCHANGE COUPLING THROUGH THIN COPPER LAYERS [J].
PARKIN, SSP ;
BHADRA, R ;
ROCHE, KP .
PHYSICAL REVIEW LETTERS, 1991, 66 (16) :2152-2155
[8]   NONOSCILLATORY MAGNETORESISTANCE IN CO/CU/CO LAYERED STRUCTURES WITH OSCILLATORY COUPLING [J].
SPERIOSU, VS ;
DIENY, B ;
HUMBERT, P ;
GURNEY, BA ;
LEFAKIS, H .
PHYSICAL REVIEW B, 1991, 44 (10) :5358-5361