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Title: Non-Collinear Magnetism in Permalloy

Abstract

Permalloy is an important material in a wide variety of magnetic systems, most notably in GMR read-heads. However, despite this great interest its properties are not fully understood. For an in depth analysis of important physical properties as e.g. electric transport or magnetic anisotropy a detailed understanding of the distribution of magnetic moments on an atomic level is necessary. Using our first principles Locally Self-consistent Multiple Scattering (LSMS) method we calculate the magnetic ground state structure for a large super-cell model of Permalloy. Our code allows us to solve both the usual non-relativistic Schrdinger equation as well as the fully relativistic Dirac equation and to find the magnitude and direction of the magnetic moments at each atomic site. While the non-relativistic calculation yields a collinear ground state in accordance with previous calculations, we find the ground state for the fully relativistic calculation to be slightly non-collinear. We also investigate the influence of variations in the iron concentration on the distribution of magnetic moments.

Authors:
 [1];  [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Center for Computational Sciences
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
931297
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: 10th Joint MMM/Intermag Conference, Baltimore, MD, USA, 20070107, 20070111
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANISOTROPY; DIRAC EQUATION; GROUND STATES; IRON; MAGNETIC MOMENTS; MAGNETISM; MULTIPLE SCATTERING; PERMALLOY; PHYSICAL PROPERTIES; TRANSPORT

Citation Formats

Eisenbach, Markus, Nicholson, Don M, and Stocks, George Malcolm. Non-Collinear Magnetism in Permalloy. United States: N. p., 2007. Web.
Eisenbach, Markus, Nicholson, Don M, & Stocks, George Malcolm. Non-Collinear Magnetism in Permalloy. United States.
Eisenbach, Markus, Nicholson, Don M, and Stocks, George Malcolm. Mon . "Non-Collinear Magnetism in Permalloy". United States. doi:.
@article{osti_931297,
title = {Non-Collinear Magnetism in Permalloy},
author = {Eisenbach, Markus and Nicholson, Don M and Stocks, George Malcolm},
abstractNote = {Permalloy is an important material in a wide variety of magnetic systems, most notably in GMR read-heads. However, despite this great interest its properties are not fully understood. For an in depth analysis of important physical properties as e.g. electric transport or magnetic anisotropy a detailed understanding of the distribution of magnetic moments on an atomic level is necessary. Using our first principles Locally Self-consistent Multiple Scattering (LSMS) method we calculate the magnetic ground state structure for a large super-cell model of Permalloy. Our code allows us to solve both the usual non-relativistic Schrdinger equation as well as the fully relativistic Dirac equation and to find the magnitude and direction of the magnetic moments at each atomic site. While the non-relativistic calculation yields a collinear ground state in accordance with previous calculations, we find the ground state for the fully relativistic calculation to be slightly non-collinear. We also investigate the influence of variations in the iron concentration on the distribution of magnetic moments.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
Other availability
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