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Title: Dynamic origin of stripe domains in cobalt bars.

Abstract

Based on dynamical calculations, we theoretically study the nucleation of stripe domains in single-crystal Co bars. Three different stripe domain structures at remanence are obtained in micromagnetic simulations depending on different field histories. We show that the nucleation of all three stripe domains are related to soft mode instabilities. When the field is along the long axis of the bar, the remanent stripe domain structure is shown to be generated by a standing-wave mode, that has the same spatial structure as the stripes at remanence and goes soft at a second-order phase transition where the stripe domains emerge. For the other two directions of the field, we find that the symmetry of soft modes is consistent with the change in symmetry of the ground state but in these cases the phase transition is first order.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); OUS
OSTI Identifier:
1000654
Report Number(s):
ANL/MCS/CP-118796
Journal ID: 0304-8853; TRN: US201101%%352
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Conference
Resource Relation:
Journal Name: J. Magn. Magn. Mater.; Journal Volume: 2; Journal Issue: 310 ; Mar. 2007; Conference: 17th International Conference on Magnetism (ICM); Aug. 20, 2006 - Aug. 25, 2006; Kyoto, Japan
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; COBALT; DOMAIN STRUCTURE; GROUND STATES; MAGNETISM; NUCLEATION; ORIGIN; SIMULATION; SPIN; SYMMETRY; PHASE TRANSFORMATIONS

Citation Formats

Yan, M., Leaf, G., Kaper, H., Novosad, V., Vavassori, P., Camley, R. E., Grimsditch, M., Univ. of Ferrara, and Univ. of Colorado. Dynamic origin of stripe domains in cobalt bars.. United States: N. p., 2007. Web. doi:10.1016/j.jmmm.2006.10.1127.
Yan, M., Leaf, G., Kaper, H., Novosad, V., Vavassori, P., Camley, R. E., Grimsditch, M., Univ. of Ferrara, & Univ. of Colorado. Dynamic origin of stripe domains in cobalt bars.. United States. doi:10.1016/j.jmmm.2006.10.1127.
Yan, M., Leaf, G., Kaper, H., Novosad, V., Vavassori, P., Camley, R. E., Grimsditch, M., Univ. of Ferrara, and Univ. of Colorado. Thu . "Dynamic origin of stripe domains in cobalt bars.". United States. doi:10.1016/j.jmmm.2006.10.1127.
@article{osti_1000654,
title = {Dynamic origin of stripe domains in cobalt bars.},
author = {Yan, M. and Leaf, G. and Kaper, H. and Novosad, V. and Vavassori, P. and Camley, R. E. and Grimsditch, M. and Univ. of Ferrara and Univ. of Colorado},
abstractNote = {Based on dynamical calculations, we theoretically study the nucleation of stripe domains in single-crystal Co bars. Three different stripe domain structures at remanence are obtained in micromagnetic simulations depending on different field histories. We show that the nucleation of all three stripe domains are related to soft mode instabilities. When the field is along the long axis of the bar, the remanent stripe domain structure is shown to be generated by a standing-wave mode, that has the same spatial structure as the stripes at remanence and goes soft at a second-order phase transition where the stripe domains emerge. For the other two directions of the field, we find that the symmetry of soft modes is consistent with the change in symmetry of the ground state but in these cases the phase transition is first order.},
doi = {10.1016/j.jmmm.2006.10.1127},
journal = {J. Magn. Magn. Mater.},
number = 310 ; Mar. 2007,
volume = 2,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}

Conference:
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