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Title: Magnetic ordering in a [Fe/Co]{sub 35} BCC film studied by nuclear resonant reflectometry

Abstract

An analysis of the angular dependences of nuclear resonant reflectivity time spectra for different models of magnetic ordering in films reveals an ambiguity in the magnetization direction determined from spectra measured at one orientation of the sample. This analysis explains features in the spectra of the nuclear resonant reflectivity from a MgO/[Fe(6 ML)/Co(3 ML)]{sub 35}/V (1 nm) film measured before and after sample rotation by 90{sup o} about the normal to the surface. It is shown that the spectrum measured only at one orientation of the sample determines only the effective azimuth angle of magnetization {gamma}{sup eff}. This does not exclude the occurrence of a domain structure, while the angle {gamma}{sup eff} does not correspond to the true direction of the preferred orientation of magnetization. The results of measurements at two orientations of the sample can be satisfactorily matched using a model that considers a coherent mixture of states with magnetization directed along the <110> axis (77%) and with a chaotic orientation of the magnetic hyperfine field B{sub hf} in the film plane for the other nuclei.

Authors:
;  [1]; ; ;  [2]
  1. Moscow State University (Russian Federation)
  2. Uppsala University, Department of Physics (Sweden)
Publication Date:
OSTI Identifier:
21072497
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 104; Journal Issue: 4; Other Information: DOI: 10.1134/S1063776107040085; Copyright (c) 2007 Nauka/Interperiodica; Article Copyright (c) 2007 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BCC LATTICES; CHAOS THEORY; COBALT; DOMAIN STRUCTURE; GRAIN ORIENTATION; IRON; MAGNESIUM OXIDES; MAGNETIZATION; MIXTURES; NANOSTRUCTURES; THIN FILMS

Citation Formats

Andreeva, M. A., E-mail: marina@ttk.ru, Monina, N. G., Lindgren, B., Haeggstroem, L., and Kalska, B.. Magnetic ordering in a [Fe/Co]{sub 35} BCC film studied by nuclear resonant reflectometry. United States: N. p., 2007. Web. doi:10.1134/S1063776107040085.
Andreeva, M. A., E-mail: marina@ttk.ru, Monina, N. G., Lindgren, B., Haeggstroem, L., & Kalska, B.. Magnetic ordering in a [Fe/Co]{sub 35} BCC film studied by nuclear resonant reflectometry. United States. doi:10.1134/S1063776107040085.
Andreeva, M. A., E-mail: marina@ttk.ru, Monina, N. G., Lindgren, B., Haeggstroem, L., and Kalska, B.. Sun . "Magnetic ordering in a [Fe/Co]{sub 35} BCC film studied by nuclear resonant reflectometry". United States. doi:10.1134/S1063776107040085.
@article{osti_21072497,
title = {Magnetic ordering in a [Fe/Co]{sub 35} BCC film studied by nuclear resonant reflectometry},
author = {Andreeva, M. A., E-mail: marina@ttk.ru and Monina, N. G. and Lindgren, B. and Haeggstroem, L. and Kalska, B.},
abstractNote = {An analysis of the angular dependences of nuclear resonant reflectivity time spectra for different models of magnetic ordering in films reveals an ambiguity in the magnetization direction determined from spectra measured at one orientation of the sample. This analysis explains features in the spectra of the nuclear resonant reflectivity from a MgO/[Fe(6 ML)/Co(3 ML)]{sub 35}/V (1 nm) film measured before and after sample rotation by 90{sup o} about the normal to the surface. It is shown that the spectrum measured only at one orientation of the sample determines only the effective azimuth angle of magnetization {gamma}{sup eff}. This does not exclude the occurrence of a domain structure, while the angle {gamma}{sup eff} does not correspond to the true direction of the preferred orientation of magnetization. The results of measurements at two orientations of the sample can be satisfactorily matched using a model that considers a coherent mixture of states with magnetization directed along the <110> axis (77%) and with a chaotic orientation of the magnetic hyperfine field B{sub hf} in the film plane for the other nuclei.},
doi = {10.1134/S1063776107040085},
journal = {Journal of Experimental and Theoretical Physics},
number = 4,
volume = 104,
place = {United States},
year = {Sun Apr 15 00:00:00 EDT 2007},
month = {Sun Apr 15 00:00:00 EDT 2007}
}