Influence of aluminium additions on exchange interaction and magnetostriction of Sm 0.9Pr0.1Fe2

Z.J. Guo; Z.D. Zhang; X.G. Zhao; W. Liu; X.M. Jin; D.Y. Geng; J.P. Liu; Simon Busbridge

doi:10.1109/20.951277

Influence of aluminium additions on exchange interaction and magnetostriction of Sm 0.9Pr0.1Fe2

Z.J. Guo, Z.D. Zhang, X.G. Zhao, W. Liu, X.M. Jin, D.Y. Geng, J.P. Liu, Simon Busbridge

University of Brighton

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

Abstract

Structure, exchange interaction, magnetic properties and magnetostriction of series of cubic C15 MgCu2-type rare-earth transition-metal (R-T) compounds of Sm0.9Pr0.1(Fe 1-xAlx)2 (0⩽x⩽0.2) have been studied by X-ray diffraction, AC initial susceptibility, vibrating samples magnetometer and standard strain technology. The substitution of Al for Fe leads to an expansion of the lattice parameter α by 5.1%. Curie temperature Tc is reduced continuously by replacing Fe with Al, which is ascribed to the decrease of the R-T coupling strength. The intersublattice coupling constant JRT, molecular field coefficient nRT, and exchange field Bex , are evaluated by a molecular field model. The decrease of JRT with increasing Al content is related to the decrease of the number of (Sm,Pr)-Fe interacting pairs. Both the magnetostriction constant λ111 and the polycrystalline saturation magnetostriction λs at room temperature decrease with the Al addition, which can be ascribed to the decrease of the coupling strength.

Original language	English
Pages (from-to)	2693-2695
Number of pages	3
Journal	IEEE transactions on magnetics
Volume	37
Issue number	4
DOIs	https://doi.org/10.1109/20.951277
Publication status	Published - 1 Jul 2001

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title = "Influence of aluminium additions on exchange interaction and magnetostriction of Sm 0.9Pr0.1Fe2",

abstract = "Structure, exchange interaction, magnetic properties and magnetostriction of series of cubic C15 MgCu2-type rare-earth transition-metal (R-T) compounds of Sm0.9Pr0.1(Fe 1-xAlx)2 (0⩽x⩽0.2) have been studied by X-ray diffraction, AC initial susceptibility, vibrating samples magnetometer and standard strain technology. The substitution of Al for Fe leads to an expansion of the lattice parameter α by 5.1%. Curie temperature Tc is reduced continuously by replacing Fe with Al, which is ascribed to the decrease of the R-T coupling strength. The intersublattice coupling constant JRT, molecular field coefficient nRT, and exchange field Bex , are evaluated by a molecular field model. The decrease of JRT with increasing Al content is related to the decrease of the number of (Sm,Pr)-Fe interacting pairs. Both the magnetostriction constant λ111 and the polycrystalline saturation magnetostriction λs at room temperature decrease with the Al addition, which can be ascribed to the decrease of the coupling strength.",

author = "Z.J. Guo and Z.D. Zhang and X.G. Zhao and W. Liu and X.M. Jin and D.Y. Geng and J.P. Liu and Simon Busbridge",

year = "2001",

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doi = "10.1109/20.951277",

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T1 - Influence of aluminium additions on exchange interaction and magnetostriction of Sm 0.9Pr0.1Fe2

AU - Guo, Z.J.

AU - Zhang, Z.D.

AU - Zhao, X.G.

AU - Liu, W.

AU - Jin, X.M.

AU - Geng, D.Y.

AU - Liu, J.P.

AU - Busbridge, Simon

PY - 2001/7/1

Y1 - 2001/7/1

N2 - Structure, exchange interaction, magnetic properties and magnetostriction of series of cubic C15 MgCu2-type rare-earth transition-metal (R-T) compounds of Sm0.9Pr0.1(Fe 1-xAlx)2 (0⩽x⩽0.2) have been studied by X-ray diffraction, AC initial susceptibility, vibrating samples magnetometer and standard strain technology. The substitution of Al for Fe leads to an expansion of the lattice parameter α by 5.1%. Curie temperature Tc is reduced continuously by replacing Fe with Al, which is ascribed to the decrease of the R-T coupling strength. The intersublattice coupling constant JRT, molecular field coefficient nRT, and exchange field Bex , are evaluated by a molecular field model. The decrease of JRT with increasing Al content is related to the decrease of the number of (Sm,Pr)-Fe interacting pairs. Both the magnetostriction constant λ111 and the polycrystalline saturation magnetostriction λs at room temperature decrease with the Al addition, which can be ascribed to the decrease of the coupling strength.

AB - Structure, exchange interaction, magnetic properties and magnetostriction of series of cubic C15 MgCu2-type rare-earth transition-metal (R-T) compounds of Sm0.9Pr0.1(Fe 1-xAlx)2 (0⩽x⩽0.2) have been studied by X-ray diffraction, AC initial susceptibility, vibrating samples magnetometer and standard strain technology. The substitution of Al for Fe leads to an expansion of the lattice parameter α by 5.1%. Curie temperature Tc is reduced continuously by replacing Fe with Al, which is ascribed to the decrease of the R-T coupling strength. The intersublattice coupling constant JRT, molecular field coefficient nRT, and exchange field Bex , are evaluated by a molecular field model. The decrease of JRT with increasing Al content is related to the decrease of the number of (Sm,Pr)-Fe interacting pairs. Both the magnetostriction constant λ111 and the polycrystalline saturation magnetostriction λs at room temperature decrease with the Al addition, which can be ascribed to the decrease of the coupling strength.

U2 - 10.1109/20.951277

DO - 10.1109/20.951277

M3 - Article

SN - 0018-9464

VL - 37

SP - 2693

EP - 2695

JO - IEEE transactions on magnetics

JF - IEEE transactions on magnetics

IS - 4

ER -

Influence of aluminium additions on exchange interaction and magnetostriction of Sm 0.9Pr0.1Fe2

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