Theoretical investigation of temperature induced phase transition in exchange coupled double layers

R. Sbiaa; H. Le Gall; O. Koshkina; M. El Harfaoui

doi:10.1063/1.364478

Theoretical investigation of temperature induced phase transition in exchange coupled double layers

R. Sbiaa^*, H. Le Gall, O. Koshkina, M. El Harfaoui

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

In the present work the mean field theory is used to determine the magnetic properties of a GdCo "planar" layer under exchange interaction with a TbFeCo "perpendicular" layer. The magnetization distributions φ₁ nd φ₂ in the planar and perpendicular layers are determined from a micromagnetic model using a variational method of the magnetic energies in the temperature range 0-500 K. φ₂ presents small change with the temperature. On the other hand, φ₁ and its mean value 〈φ₁〉 are very sensitive to the temperature and the layer composition and thickness. A temperature induced phase transition with a magnetization reorientation from in-plane to a perpendicular direction can be induced in the planar layer in a temperature window ΔT which depends on its compensation temperature T_CPI and its thickness which has to be lower than a critical value.

Original language	English
Pages (from-to)	5236-5238
Number of pages	3
Journal	Journal of Applied Physics
Volume	81
Issue number	8 PART 2B
DOIs	https://doi.org/10.1063/1.364478
Publication status	Published - Apr 15 1997
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Theoretical investigation of temperature induced phase transition in exchange coupled double layers",

abstract = "In the present work the mean field theory is used to determine the magnetic properties of a GdCo {"}planar{"} layer under exchange interaction with a TbFeCo {"}perpendicular{"} layer. The magnetization distributions φ1 nd φ2 in the planar and perpendicular layers are determined from a micromagnetic model using a variational method of the magnetic energies in the temperature range 0-500 K. φ2 presents small change with the temperature. On the other hand, φ1 and its mean value 〈φ1〉 are very sensitive to the temperature and the layer composition and thickness. A temperature induced phase transition with a magnetization reorientation from in-plane to a perpendicular direction can be induced in the planar layer in a temperature window ΔT which depends on its compensation temperature TCPI and its thickness which has to be lower than a critical value.",

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T1 - Theoretical investigation of temperature induced phase transition in exchange coupled double layers

AU - Sbiaa, R.

AU - Le Gall, H.

AU - Koshkina, O.

AU - El Harfaoui, M.

PY - 1997/4/15

Y1 - 1997/4/15

N2 - In the present work the mean field theory is used to determine the magnetic properties of a GdCo "planar" layer under exchange interaction with a TbFeCo "perpendicular" layer. The magnetization distributions φ1 nd φ2 in the planar and perpendicular layers are determined from a micromagnetic model using a variational method of the magnetic energies in the temperature range 0-500 K. φ2 presents small change with the temperature. On the other hand, φ1 and its mean value 〈φ1〉 are very sensitive to the temperature and the layer composition and thickness. A temperature induced phase transition with a magnetization reorientation from in-plane to a perpendicular direction can be induced in the planar layer in a temperature window ΔT which depends on its compensation temperature TCPI and its thickness which has to be lower than a critical value.

AB - In the present work the mean field theory is used to determine the magnetic properties of a GdCo "planar" layer under exchange interaction with a TbFeCo "perpendicular" layer. The magnetization distributions φ1 nd φ2 in the planar and perpendicular layers are determined from a micromagnetic model using a variational method of the magnetic energies in the temperature range 0-500 K. φ2 presents small change with the temperature. On the other hand, φ1 and its mean value 〈φ1〉 are very sensitive to the temperature and the layer composition and thickness. A temperature induced phase transition with a magnetization reorientation from in-plane to a perpendicular direction can be induced in the planar layer in a temperature window ΔT which depends on its compensation temperature TCPI and its thickness which has to be lower than a critical value.

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JF - Journal of Applied Physics

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Theoretical investigation of temperature induced phase transition in exchange coupled double layers

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