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Title: Superexchange and iron valence control by off-stoichiometry in yttrium iron garnet thin films grown by pulsed laser deposition

Abstract

Controlled off-stoichiometric single phase polycrystalline yttrium iron garnet (YIG) thin films have been grown by pulsed laser deposition, adjusting the oxygen partial pressure P{sub O2} between 5 and 400 mTorr. Atomic stoichiometry by RBS shows an oxygen deficiency for P{sub O2}<P{sub stoich} and iron and yttrium deficiency for P{sub O2}>P{sub stoich}. P{sub stoich}=30 mTorr refers to films showing magnetic and structural properties of the bulk stoichiometric YIG. Curie temperature T{sub c} and saturation magnetization 4{pi}Ms decreased for P{sub O2}<P{sub stoich}, whereas a new part of the YIG phase diagram is explored for P{sub O2}>P{sub stoich}: Increase of Tc (up to +10%) and of 4{pi}Ms (up to +20%) and lattice parameter compression. Microscopic interpretation is given in terms of superexchange interaction and creation and site selectivity of iron vacancies.

Authors:
; ; ; ; ; ; ;  [1]
  1. LPSC, CNRS-University of Versailles, 1 Pl. A. Briand, 92192 Meudon, Cedex (France) and LMOV, CNRS-University of Versailles, 45 av. des Etats-Unis, 78035 Versailles, Cedex (France)
Publication Date:
OSTI Identifier:
20711629
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 97; Journal Issue: 10; Conference: 49. annual conference on magnetism and magnetic materials, Jacksonville, FL (United States), 7-11 Nov 2004; Other Information: DOI: 10.1063/1.1860991; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CURIE POINT; ENERGY BEAM DEPOSITION; FERRITE GARNETS; LASER RADIATION; LATTICE PARAMETERS; MAGNETIZATION; OXYGEN; PARTIAL PRESSURE; PHASE DIAGRAMS; POLYCRYSTALS; PULSED IRRADIATION; RUTHERFORD BACKSCATTERING SPECTROSCOPY; STOICHIOMETRY; THIN FILMS; VACANCIES; YTTRIUM COMPOUNDS

Citation Formats

Dumont, Y, Keller, N, Popova, E, Schmool, D S, Bhattacharya, S, Stahl, B, Tessier, M, Guyot, M, LMOV, CNRS-University of Versailles, 45 av. des Etats-Unis, 78035 Versailles Cedex, Laboratorium voor Vaste-Stoffysica en Magnetisme, K.U. Leuven, Celestijnenlaan 200 D 3001 Leuven, Departamento de Fisica and IFIMUP, Universidade do Porto, Rua Campo Alegre 687, 4169 007 Porto, Fachbereich Materialwissenschaft, T.U. Darmstadt, Petersenstrasse 23, D-64287 Darmstadt, and LMOV, CNRS-University of Versailles, 45 av. des Etats-Unis, 78035 Versailles, Cedex. Superexchange and iron valence control by off-stoichiometry in yttrium iron garnet thin films grown by pulsed laser deposition. United States: N. p., 2005. Web. doi:10.1063/1.1860991.
Dumont, Y, Keller, N, Popova, E, Schmool, D S, Bhattacharya, S, Stahl, B, Tessier, M, Guyot, M, LMOV, CNRS-University of Versailles, 45 av. des Etats-Unis, 78035 Versailles Cedex, Laboratorium voor Vaste-Stoffysica en Magnetisme, K.U. Leuven, Celestijnenlaan 200 D 3001 Leuven, Departamento de Fisica and IFIMUP, Universidade do Porto, Rua Campo Alegre 687, 4169 007 Porto, Fachbereich Materialwissenschaft, T.U. Darmstadt, Petersenstrasse 23, D-64287 Darmstadt, & LMOV, CNRS-University of Versailles, 45 av. des Etats-Unis, 78035 Versailles, Cedex. Superexchange and iron valence control by off-stoichiometry in yttrium iron garnet thin films grown by pulsed laser deposition. United States. https://doi.org/10.1063/1.1860991
Dumont, Y, Keller, N, Popova, E, Schmool, D S, Bhattacharya, S, Stahl, B, Tessier, M, Guyot, M, LMOV, CNRS-University of Versailles, 45 av. des Etats-Unis, 78035 Versailles Cedex, Laboratorium voor Vaste-Stoffysica en Magnetisme, K.U. Leuven, Celestijnenlaan 200 D 3001 Leuven, Departamento de Fisica and IFIMUP, Universidade do Porto, Rua Campo Alegre 687, 4169 007 Porto, Fachbereich Materialwissenschaft, T.U. Darmstadt, Petersenstrasse 23, D-64287 Darmstadt, and LMOV, CNRS-University of Versailles, 45 av. des Etats-Unis, 78035 Versailles, Cedex. 2005. "Superexchange and iron valence control by off-stoichiometry in yttrium iron garnet thin films grown by pulsed laser deposition". United States. https://doi.org/10.1063/1.1860991.
@article{osti_20711629,
title = {Superexchange and iron valence control by off-stoichiometry in yttrium iron garnet thin films grown by pulsed laser deposition},
author = {Dumont, Y and Keller, N and Popova, E and Schmool, D S and Bhattacharya, S and Stahl, B and Tessier, M and Guyot, M and LMOV, CNRS-University of Versailles, 45 av. des Etats-Unis, 78035 Versailles Cedex and Laboratorium voor Vaste-Stoffysica en Magnetisme, K.U. Leuven, Celestijnenlaan 200 D 3001 Leuven and Departamento de Fisica and IFIMUP, Universidade do Porto, Rua Campo Alegre 687, 4169 007 Porto and Fachbereich Materialwissenschaft, T.U. Darmstadt, Petersenstrasse 23, D-64287 Darmstadt and LMOV, CNRS-University of Versailles, 45 av. des Etats-Unis, 78035 Versailles, Cedex},
abstractNote = {Controlled off-stoichiometric single phase polycrystalline yttrium iron garnet (YIG) thin films have been grown by pulsed laser deposition, adjusting the oxygen partial pressure P{sub O2} between 5 and 400 mTorr. Atomic stoichiometry by RBS shows an oxygen deficiency for P{sub O2}<P{sub stoich} and iron and yttrium deficiency for P{sub O2}>P{sub stoich}. P{sub stoich}=30 mTorr refers to films showing magnetic and structural properties of the bulk stoichiometric YIG. Curie temperature T{sub c} and saturation magnetization 4{pi}Ms decreased for P{sub O2}<P{sub stoich}, whereas a new part of the YIG phase diagram is explored for P{sub O2}>P{sub stoich}: Increase of Tc (up to +10%) and of 4{pi}Ms (up to +20%) and lattice parameter compression. Microscopic interpretation is given in terms of superexchange interaction and creation and site selectivity of iron vacancies.},
doi = {10.1063/1.1860991},
url = {https://www.osti.gov/biblio/20711629}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 10,
volume = 97,
place = {United States},
year = {Sun May 15 00:00:00 EDT 2005},
month = {Sun May 15 00:00:00 EDT 2005}
}