Magnetization process in a classical system of Preisach-type particles

Martha Pardavi-Horvath, Guobao Zheng, G. Vértesy

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The magnetization process of a regular two-dimensional array of small individual, strongly uniaxial magnetic garnet particles, groups of particles and major loop properties of a "macroscopic" sample has been investigated experimentally in an optical magnetometer. These particles correspond to the assumptions of a simple Preisach model. The switching mode is coherent rotation. Each particle has a square hysteresis loop, with no reversible or apparent reversible component. Requirements of wiping-out and congruency properties are satisfied. From measurements of the up-and down switching fields on individual particles, the major loop can be reconstructed, and it is shown to be in nearly exact correspondence with the measured one. The transition from individual to collective behavior is smooth and the properties of a system consisting of 100 particles correspond to the major loop behavior. The interaction field for an assembly of 25 particles was calculated numerically. The switching sequence and the magnetization curve for the 25 particles assembly was derived from the calculated interaction fields and found to be in a very good agreement with the measured values.

Original languageEnglish
Pages (from-to)287-293
Number of pages7
JournalPhysica B: Condensed Matter
Volume233
Issue number4
Publication statusPublished - Jun 1 1997

Fingerprint

Magnetization
magnetization
Garnets
Magnetometers
Hysteresis loops
assembly
garnets
magnetometers
hysteresis
interactions
requirements
curves

Keywords

  • Magnetic hysteresis
  • Preisach model
  • Switching fields

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Magnetization process in a classical system of Preisach-type particles. / Pardavi-Horvath, Martha; Zheng, Guobao; Vértesy, G.

In: Physica B: Condensed Matter, Vol. 233, No. 4, 01.06.1997, p. 287-293.

Research output: Contribution to journalArticle

Pardavi-Horvath, Martha ; Zheng, Guobao ; Vértesy, G. / Magnetization process in a classical system of Preisach-type particles. In: Physica B: Condensed Matter. 1997 ; Vol. 233, No. 4. pp. 287-293.
@article{6d015370224c4455aec686c5ff5458b1,
title = "Magnetization process in a classical system of Preisach-type particles",
abstract = "The magnetization process of a regular two-dimensional array of small individual, strongly uniaxial magnetic garnet particles, groups of particles and major loop properties of a {"}macroscopic{"} sample has been investigated experimentally in an optical magnetometer. These particles correspond to the assumptions of a simple Preisach model. The switching mode is coherent rotation. Each particle has a square hysteresis loop, with no reversible or apparent reversible component. Requirements of wiping-out and congruency properties are satisfied. From measurements of the up-and down switching fields on individual particles, the major loop can be reconstructed, and it is shown to be in nearly exact correspondence with the measured one. The transition from individual to collective behavior is smooth and the properties of a system consisting of 100 particles correspond to the major loop behavior. The interaction field for an assembly of 25 particles was calculated numerically. The switching sequence and the magnetization curve for the 25 particles assembly was derived from the calculated interaction fields and found to be in a very good agreement with the measured values.",
keywords = "Magnetic hysteresis, Preisach model, Switching fields",
author = "Martha Pardavi-Horvath and Guobao Zheng and G. V{\'e}rtesy",
year = "1997",
month = "6",
day = "1",
language = "English",
volume = "233",
pages = "287--293",
journal = "Physica B: Condensed Matter",
issn = "0921-4526",
publisher = "Elsevier",
number = "4",

}

TY - JOUR

T1 - Magnetization process in a classical system of Preisach-type particles

AU - Pardavi-Horvath, Martha

AU - Zheng, Guobao

AU - Vértesy, G.

PY - 1997/6/1

Y1 - 1997/6/1

N2 - The magnetization process of a regular two-dimensional array of small individual, strongly uniaxial magnetic garnet particles, groups of particles and major loop properties of a "macroscopic" sample has been investigated experimentally in an optical magnetometer. These particles correspond to the assumptions of a simple Preisach model. The switching mode is coherent rotation. Each particle has a square hysteresis loop, with no reversible or apparent reversible component. Requirements of wiping-out and congruency properties are satisfied. From measurements of the up-and down switching fields on individual particles, the major loop can be reconstructed, and it is shown to be in nearly exact correspondence with the measured one. The transition from individual to collective behavior is smooth and the properties of a system consisting of 100 particles correspond to the major loop behavior. The interaction field for an assembly of 25 particles was calculated numerically. The switching sequence and the magnetization curve for the 25 particles assembly was derived from the calculated interaction fields and found to be in a very good agreement with the measured values.

AB - The magnetization process of a regular two-dimensional array of small individual, strongly uniaxial magnetic garnet particles, groups of particles and major loop properties of a "macroscopic" sample has been investigated experimentally in an optical magnetometer. These particles correspond to the assumptions of a simple Preisach model. The switching mode is coherent rotation. Each particle has a square hysteresis loop, with no reversible or apparent reversible component. Requirements of wiping-out and congruency properties are satisfied. From measurements of the up-and down switching fields on individual particles, the major loop can be reconstructed, and it is shown to be in nearly exact correspondence with the measured one. The transition from individual to collective behavior is smooth and the properties of a system consisting of 100 particles correspond to the major loop behavior. The interaction field for an assembly of 25 particles was calculated numerically. The switching sequence and the magnetization curve for the 25 particles assembly was derived from the calculated interaction fields and found to be in a very good agreement with the measured values.

KW - Magnetic hysteresis

KW - Preisach model

KW - Switching fields

UR - http://www.scopus.com/inward/record.url?scp=0031165052&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031165052&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0031165052

VL - 233

SP - 287

EP - 293

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

SN - 0921-4526

IS - 4

ER -