A Mossbauer study of Fe(5 Å)+Cu(50 Å) multilayers

Author

Pankhurst, Q.A. ; Thomas, M.F. ; Johnson, C.E. ; Zquiak, R. ; Zhang, X.X. ; Tejada, J.

Author_Institution

Dept. of Phys., Liverpool Univ., UK

Volume

30

Issue

2

fYear

1994

fDate

3/1/1994 12:00:00 AM

Firstpage

778

Lastpage

780

Abstract

Recent magnetic viscosity studies of Fe/Cu multilayer systems containing 5 Å layers of Fe sandwiched between 50 Å layers of Cu(111) have shown behaviour that is consistent with macroscopic quantum tunnelling of the magnetization. As part of a wider program of measurements aimed at characterising this system, ⁵⁷Fe Mossbauer spectra of two samples grown in different laboratories were recorded at temperatures ranging from room temperature to 4.2 K, and at 4.2 K in applied fields of up to 5 T. The Mossbauer data show that one sample contains iron oxide impurities, but that both samples contain roughly equal quantities of ferromagnetic BCC Fe and antiferromagnetic FCC Fe. The Fe moments in both the BCC and FCC phases lie preferentially in the plane of the multilayer film

Keywords

Mossbauer effect; copper; ferromagnetic properties of substances; iron; magnetic multilayers; magnetisation; 4.2 to 293 K; ⁵⁷Fe Mossbauer spectra; Fe-Cu; Fe/Cu multilayers; antiferromagnetic FCC Fe; ferromagnetic BCC Fe; macroscopic quantum tunnelling; magnetic viscosity; magnetization; FCC; Iron; Magnetic field measurement; Magnetic multilayers; Magnetic tunneling; Magnetization; Nonhomogeneous media; Phase measurement; Temperature distribution; Viscosity;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.312406

Filename

312406