Thermal stability of CoFe, Co and NiFe/Co spin valves

被引：14

作者：

Zeltser, AM ^{[1
]}

Pentek, K

Menyhard, M

Sulyok, A

机构：

[1] Eastman Kodak Co, San Diego Labs, San Diego, CA 92121 USA

[2] Hungarian Acad Sci, Tech Phys Res Inst, H-1325 Budapest, Hungary

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1998年 / 34卷 / 04期

关键词：

auger depth profiling; Co and CoFe spin valves; FeMn exchange pinning; thermal stability;

D O I：

10.1109/20.706567

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The magnetotransport and magnetic properties of three types of spin valves containing CoFe and Co in the free and pinned layers were investigated as a function of annealing temperature. The microchemical changes induced by annealing were correlated with the evolution df spin valve properties. Auger depth profiling and X-ray diffraction revealed that excellent thermal stability up to 220 degrees C of the spin valves containing CoFe and Co can be attributed to an improvement in perfection of the as-sputtered, initially compositionally intermixed Co(Fe)/Cu/Co(Fe) and NiFe/Ta interfaces. The best overall thermal stability was exhibited by the 50Ta/20NiFe/30CoFe/23Cu/50CoFe/90FeMn/50Ta (layer thicknesses in A) spin valve. After annealing for 2 hours at 260 degrees C, it showed magnetoresistance ratio of 7.5 %, exchange pinning field of 165 Oe, interlayer coupling held of similar to 11 Oe and easy axis coercivity of <4 Oe.

引用

页码：1417 / 1419

页数：3

共 11 条

[1] HREM study of Co/Cu/Co/MnFe spin valves [J].

Bayle-Guillemaud, P ;

PetfordLong, AK ;

Anthony, TC ;

Brug, JA .

IEEE TRANSACTIONS ON MAGNETICS, 1996, 32 (05) :4627-4629

[2]

BRUNDLE C, 1992, ENCY MAT CHARACTERIZ, P293

[3] EFFECT OF ANNEALING ON THE INTERFACES OF GIANT-MAGNETORESISTANCE SPIN-VALVE STRUCTURES [J].

HUANG, TC ;

NOZIERES, JP ;

SPERIOSU, VS ;

GURNEY, BA ;

LEFAKIS, H .

APPLIED PHYSICS LETTERS, 1993, 62 (13) :1478-1480

[4] Magnetoresistance and morphology in magnetic multilayers by insertion of very thin Fe, Co layers [J].

Hwang, DG ;

Lee, SS ;

Lee, KA ;

Park, CM ;

Kim, MY ;

Choi, KR ;

Choi, SJ ;

Lee, YH ;

Rhee, JR .

IEEE TRANSACTIONS ON MAGNETICS, 1996, 32 (05) :4579-4581

[5] Giant magnetoresistance and soft magnetic properties of Co90Fe10/Cu spin-valve structures [J].

Kamiguchi, Y ;

Saito, K ;

Iwasaki, H ;

Sahashi, M ;

Ouse, M ;

Nakamura, S .

JOURNAL OF APPLIED PHYSICS, 1996, 79 (08) :6399-6401

[6] Spin-valve read heads with NiFe/Co90Fe10 layers for 5 Gbit/in(2) density recording [J].

Kanai, H ;

Yamada, K ;

Aoshima, K ;

Ohtsuka, Y ;

Kane, J ;

Kanamine, M ;

Toda, J ;

Mizoshita, Y .

IEEE TRANSACTIONS ON MAGNETICS, 1996, 32 (05) :3368-3373

[7]

MENY C, 1993, MATER RES SOC SYMP P, V313, P289, DOI 10.1557/PROC-313-289

[8]

MENYHARD M, 1997, COMMUNICATION

[9] ORIGIN OF ENHANCED MAGNETORESISTANCE OF MAGNETIC MULTILAYERS - SPIN-DEPENDENT SCATTERING FROM MAGNETIC INTERFACE STATES [J].

PARKIN, SSP .

PHYSICAL REVIEW LETTERS, 1993, 71 (10) :1641-1644

[10] ROLE OF INTERFACIAL MIXING IN GIANT MAGNETORESISTANCE [J].

SPERIOSU, VS ;

NOZIERES, JP ;

GURNEY, BA ;

DIENY, B ;

HUANG, TC ;

LEFAKIS, H .

PHYSICAL REVIEW B, 1993, 47 (17) :11579-11582

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