NDLI: Thermal stability of NiMn spin valve heads

Content Provider	IEEE Xplore Digital Library
Author	Zhang, Y.B. Van Der Heijden, A. Nozieres, J.-P. Pentek, K. Chin, T.K. Tuchscherer, T. Zeltser, A.M. Blank, H.-R. Trotter, S. Jaren, S. Speriosu, V.S.
Copyright Year	1965
Abstract	The thermal stability of NiMn-based spin valves was studied both at the coupon level and in full read/write heads. In the coupons, the blocking temperature distribution showed no component below 150/spl deg/C. As a result, the exchange field at elevated temperature was found to increase with time (because of improved chemical ordering of the NiMn layer), and irreversible losses in the /spl Delta/R/R response were observed only above 250/spl deg/C (because of layer interdiffusion). If a 10% drop in /spl Delta/R/R amplitude is used as a criterion to calculate time to failure, the NiMn heads should have several hundred years of lifetime at 150/spl deg/C operating temperature. Full read/write heads showed linear response with read-back amplitudes above 2 mV//spl mu/m at 6-mA operating current. In contrast to most other giant magnetoresistance heads, the output of the head remains the same after heating with a high bias current and degrades only with the shorting of the stripe. All these properties make NiMn superior to other antiferromagnets for spin valve head applications.
Sponsorship	IEEE Magnetics Society
Starting Page	586
Ending Page	590
Page Count	5
File Size	164776
File Format	PDF
ISSN	00189464
Volume Number	36
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-05-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Thermal stability Spin valves Magnetic heads Temperature distribution Legged locomotion Antiferromagnetic materials Thermal degradation Chemicals Giant magnetoresistance Heating
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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