Magnetic and magnetotransport properties in epitaxial FeMn/Py/Cu/Py spin-valve films

Author

Huang, I. C A ; Tsao, C.H. ; Yu, C.C.

Author_Institution

Dept. of Phys., Nat. Cheng Kung Univ., Tainan, Taiwan

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

2931

Lastpage

2933

Abstract

We have studied magnetic and magnetotransport properties in fcc (111)- and (211)-oriented [FeMn/Py/Cu/Py](Py=Ni₈₀Fe₂₀) films grown on Mo(110) and Mo(211) templates by molecular beam epitaxy. Uniaxial magnetic anisotropy of the magnetic layers in both cases were self-assembled by epitaxial growth. However, the pinned layer coercive fields of the (211) films were much higher than those of the (111) samples. For both orientations the optimal exchange field (~130 Oe) and magnetoresistance (~3%) occur at substrate temperature of ~170°C, about 30-40°C above the blocking temperature of the FeMn layer

Keywords

Permalloy; antiferromagnetic materials; coercive force; copper; exchange interactions (electron); ferromagnetic materials; giant magnetoresistance; iron alloys; magnetic anisotropy; magnetic multilayers; manganese alloys; molecular beam epitaxial growth; spin valves; 170 C; FeMn-NiFe-Cu-NiFe; Mo; Mo(110); Mo(211) templates; blocking temperature; epitaxial FeMn/Py/Cu/Py spin-valve films; epitaxial growth; fcc structure; magnetic properties; magnetoresistance; magnetotransport properties; molecular beam epitaxy; optimal exchange field; pinned layer coercive fields; uniaxial magnetic anisotropy; Epitaxial growth; Iron; Magnetic anisotropy; Magnetic films; Magnetic properties; Magnetoresistance; Molecular beam epitaxial growth; Perpendicular magnetic anisotropy; Substrates; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.801032

Filename

801032