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High Thermal Stability of Exchange-Biased Bilayers and Bottom Giant Magnetoresistive Spin Valves Using an α-Fe2O3 Antiferromagnetic Layer

Published

Author(s)

S Bae, J H. Judy, P J. Chen, William F. Egelhoff Jr., S Zum

Abstract

The thermal stability of antiferromagnetic a-Fe2O3 exchange-biased bilayers and bottom giant magnetoresistive (GMR) spin-valve has been investigated experimentally at various ambient temperatures. An a-Fe2O3 exchange biased bilayer exhibited a high blocking temperature, Tb, of 390 degree C, and a bottom spin-valve possessed stable GMR performance above 350 degree C. The Tb of a-Fe2O3 exchange biased bilayers depended strongly on the adjacent ferromagnetic material and the number of measurements. In addition, increasing mean grain size and enhancing (104) and (110) cyrstalline texture of a-Fe2O3 increased Tb by up to 23%.
Citation
Applied Physics Letters
Volume
78
Issue
No. 26

Keywords

giant, iron oxide, magnetoresistance, stability, thermal

Citation

Bae, S. , Judy, J. , Chen, P. , Egelhoff Jr., W. and Zum, S. (2001), High Thermal Stability of Exchange-Biased Bilayers and Bottom Giant Magnetoresistive Spin Valves Using an &#945;-Fe<sub>2</sub>O<sub>3</sub> Antiferromagnetic Layer, Applied Physics Letters (Accessed April 20, 2024)
Created May 31, 2001, Updated October 12, 2021