A Magnetic and Conversion Electron Mössbauer Spectral Study of Amorphous Dy₂₀Fe80-yCoy Thin Films

Abstract

Amorphous thin films of Dy20Fe80-yCoy, with 0 < y < 20 and of ca. 40 nm thickness, have been prepared by sputtering on polyimide substrates. The 295 K conversion electron Mössbauer spectra (CEMS) of these films consist of broadened sextets which have been analyzed with a distribution of hyperfine fields in which the iron moments are oriented perpendicular to the plane of the film, an orientation which is in agreement with the perpendicular magnetic anisotropy observed herein at 295 K by vibrating sample magnetrometry. The average hyperfine field and isomer shift increase linearly with increasing Co content. Both increases arise from an increase in the electron occupation of the 3d states as the cobalt content increases.

Meeting Name

8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) (2001: Jan. 7-11, San Antonio, TX)

Department(s)

Chemistry

Keywords and Phrases

Amorphous alloys; Electron energy levels; Electrons; Magnetic anisotropy; Magnetic hysteresis; Magnetic moments; Magnetization; Magnetometers; Mössbauer spectroscopy; Conversion electron Mössbauer spectra (CEMS); Magnetic thin films; Hysteresis curves; Magneto-optical recording materials

International Standard Serial Number (ISSN)

0018-9464

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2001 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jul 2001

Link to Full Text

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