Calculation of the phase diagrams of ferrimagnetic alloys AcB1-c and application to transition metal-rare-earth FecGd1-c and FecTb1-c materials

M. Fresneau, A. Virlouvet, A. Khater

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A theoretical model is presented for the calculation of the magnetic properties of generalised spin ferrimagnetic random substitutional alloys AcB1-c with antiferromagnetic couping between the A and B spin species. In particular, we study in an effective field method the phase diagrams of these systems as a function of the alloy concentration c, for given magnetic exchange constants. The model is applied with no adjustable parameters to the transition metal-rare-earth FecGd1-c and FecTb1-c alloys, using the appropriate spins for the Fe, Gd and Tb ions. We report a coherent and an overall qualitative agreement between theory and experiment in the complete range of concentrations 1 ≥ c ≥ 0, for the first time to our knowledge, and determine consequently for these materials a set of ionic exchange constants that are invariant with respect to the alloy concentration. To our knowledge this is the first time that approximate but seemingly reliable exchange constants for the two alloys have been derived.

Original languageEnglish
Pages (from-to)220-230
Number of pages11
JournalJournal of Magnetism and Magnetic Materials
Volume202
Issue number1
DOIs
Publication statusPublished - Jun 1999
Externally publishedYes

Fingerprint

Rare Earth Metals
Rare earths
Phase diagrams
Transition metals
rare earth elements
transition metals
phase diagrams
Magnetic properties
Ions
magnetic properties
ions

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Calculation of the phase diagrams of ferrimagnetic alloys AcB1-c and application to transition metal-rare-earth FecGd1-c and FecTb1-c materials. / Fresneau, M.; Virlouvet, A.; Khater, A.

In: Journal of Magnetism and Magnetic Materials, Vol. 202, No. 1, 06.1999, p. 220-230.

Research output: Contribution to journalArticle

@article{acc771cd8acd44cc923acc7555503c26,
title = "Calculation of the phase diagrams of ferrimagnetic alloys AcB1-c and application to transition metal-rare-earth FecGd1-c and FecTb1-c materials",
abstract = "A theoretical model is presented for the calculation of the magnetic properties of generalised spin ferrimagnetic random substitutional alloys AcB1-c with antiferromagnetic couping between the A and B spin species. In particular, we study in an effective field method the phase diagrams of these systems as a function of the alloy concentration c, for given magnetic exchange constants. The model is applied with no adjustable parameters to the transition metal-rare-earth FecGd1-c and FecTb1-c alloys, using the appropriate spins for the Fe, Gd and Tb ions. We report a coherent and an overall qualitative agreement between theory and experiment in the complete range of concentrations 1 ≥ c ≥ 0, for the first time to our knowledge, and determine consequently for these materials a set of ionic exchange constants that are invariant with respect to the alloy concentration. To our knowledge this is the first time that approximate but seemingly reliable exchange constants for the two alloys have been derived.",
author = "M. Fresneau and A. Virlouvet and A. Khater",
year = "1999",
month = "6",
doi = "10.1016/S0304-8853(99)00365-0",
language = "English",
volume = "202",
pages = "220--230",
journal = "Journal of Magnetism and Magnetic Materials",
issn = "0304-8853",
publisher = "Elsevier",
number = "1",

}

TY - JOUR

T1 - Calculation of the phase diagrams of ferrimagnetic alloys AcB1-c and application to transition metal-rare-earth FecGd1-c and FecTb1-c materials

AU - Fresneau, M.

AU - Virlouvet, A.

AU - Khater, A.

PY - 1999/6

Y1 - 1999/6

N2 - A theoretical model is presented for the calculation of the magnetic properties of generalised spin ferrimagnetic random substitutional alloys AcB1-c with antiferromagnetic couping between the A and B spin species. In particular, we study in an effective field method the phase diagrams of these systems as a function of the alloy concentration c, for given magnetic exchange constants. The model is applied with no adjustable parameters to the transition metal-rare-earth FecGd1-c and FecTb1-c alloys, using the appropriate spins for the Fe, Gd and Tb ions. We report a coherent and an overall qualitative agreement between theory and experiment in the complete range of concentrations 1 ≥ c ≥ 0, for the first time to our knowledge, and determine consequently for these materials a set of ionic exchange constants that are invariant with respect to the alloy concentration. To our knowledge this is the first time that approximate but seemingly reliable exchange constants for the two alloys have been derived.

AB - A theoretical model is presented for the calculation of the magnetic properties of generalised spin ferrimagnetic random substitutional alloys AcB1-c with antiferromagnetic couping between the A and B spin species. In particular, we study in an effective field method the phase diagrams of these systems as a function of the alloy concentration c, for given magnetic exchange constants. The model is applied with no adjustable parameters to the transition metal-rare-earth FecGd1-c and FecTb1-c alloys, using the appropriate spins for the Fe, Gd and Tb ions. We report a coherent and an overall qualitative agreement between theory and experiment in the complete range of concentrations 1 ≥ c ≥ 0, for the first time to our knowledge, and determine consequently for these materials a set of ionic exchange constants that are invariant with respect to the alloy concentration. To our knowledge this is the first time that approximate but seemingly reliable exchange constants for the two alloys have been derived.

UR - http://www.scopus.com/inward/record.url?scp=0032652821&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032652821&partnerID=8YFLogxK

U2 - 10.1016/S0304-8853(99)00365-0

DO - 10.1016/S0304-8853(99)00365-0

M3 - Article

VL - 202

SP - 220

EP - 230

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

IS - 1

ER -