RuRhMn and PtMn specular spin-valve with magnetic oxide layer

Author

Tsuchiya, Yoshihiro ; Le, S. ; Sano, Masachi ; Uesugi, Takumi ; Araki, Satoru ; Morita, Haruyuki ; Matsuzaki, Mikio

Author_Institution

R&D Dept., TDK Corp, Nagano, Japan

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

2557

Lastpage

2559

Abstract

In this paper, RuRhMn-based and PtMn-based spin valves with magnetic oxide layer (MOL) inserted in the free layer, pinned layer, or both layers were studied. Both magnetoresistance (MR) ratio and ΔR _sq were increased in these spin valves, due to the insertion of MOL. Theoretical calculation based on semi-classical Boltzmann equation for transport indicated that the enhancement of MR ratio can be attributed to the strong specular scattering at interface with MOL. PtMn specular spin valves are more thermally stable than RuRhMn spin valves. Their thermal stability can be further improved by using a synthetic pinned layer with MOL, where the effective exchange field degrades less than 20% when the temperature is increased up to 350°C

Keywords

Boltzmann equation; exchange interactions (electron); manganese alloys; platinum alloys; rhodium alloys; ruthenium alloys; spin valves; thermal stability; 350 C; PtMn; RuRhMn; exchange field; magnetic oxide layer; magnetoresistance; semi-classical Boltzmann equation; specular scattering; spin valve; synthetic pinned layer; thermal stability; Boltzmann equation; Cobalt alloys; Iron alloys; Magnetic field measurement; Magnetoresistance; Nickel alloys; Spin valves; Temperature; Thermal stability; X-ray scattering;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908508

Filename

908508