The exchange interaction effects on magnetic properties of the nanostructured CoPt particles

S. V. Komogortsev; R. S. Iskhakov; A. A. Zimin; E. Yu Filatov; S. V. Korenev; Yu V. Shubin; N. A. Chizhik; G. Yu Yurkin; E. V. Eremin

doi:10.1016/j.jmmm.2015.10.041

The exchange interaction effects on magnetic properties of the nanostructured CoPt particles

S. V. Komogortsev, R. S. Iskhakov, A. A. Zimin, E. Yu Filatov, S. V. Korenev, Yu V. Shubin, N. A. Chizhik, G. Yu Yurkin, E. V. Eremin

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

7 Citations (Scopus)

Abstract

Various manifestations of the exchange interaction effects in magnetization curves of the CoPt nanostructured particles are demonstrated and discussed. The inter-grain exchange constant A in the sponge-like agglomerates of crystallites is estimated as A=(7±1) pJ/m from the approach magnetization to saturation curves that is in good agreement with A=(6.6±0.5) pJ/m obtained from Bloch T ^3/2 law. The fractal dimensionality of the exchange coupled crystallite system in the porous media of the disordered CoPt alloy d=(2.60±0.18) was estimated from the approach magnetization to saturation curve. Coercive force decreases with temperature as H_c~T ^3/2 which is assumed to be a consequence of the magnetic anisotropy energy reduction due to the thermal spin wave excitations in the investigated CoPt particles.

Original language	English
Pages (from-to)	236-241
Number of pages	6
Journal	Journal of Magnetism and Magnetic Materials
Volume	401
DOIs	https://doi.org/10.1016/j.jmmm.2015.10.041
Publication status	Published - 1 Mar 2016

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title = "The exchange interaction effects on magnetic properties of the nanostructured CoPt particles",

abstract = "Various manifestations of the exchange interaction effects in magnetization curves of the CoPt nanostructured particles are demonstrated and discussed. The inter-grain exchange constant A in the sponge-like agglomerates of crystallites is estimated as A=(7±1) pJ/m from the approach magnetization to saturation curves that is in good agreement with A=(6.6±0.5) pJ/m obtained from Bloch T 3/2 law. The fractal dimensionality of the exchange coupled crystallite system in the porous media of the disordered CoPt alloy d=(2.60±0.18) was estimated from the approach magnetization to saturation curve. Coercive force decreases with temperature as Hc~T 3/2 which is assumed to be a consequence of the magnetic anisotropy energy reduction due to the thermal spin wave excitations in the investigated CoPt particles.",

author = "Komogortsev, {S. V.} and Iskhakov, {R. S.} and Zimin, {A. A.} and Filatov, {E. Yu} and Korenev, {S. V.} and Shubin, {Yu V.} and Chizhik, {N. A.} and Yurkin, {G. Yu} and Eremin, {E. V.}",

year = "2016",

month = mar,

day = "1",

doi = "10.1016/j.jmmm.2015.10.041",

language = "English",

volume = "401",

pages = "236--241",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

}

The exchange interaction effects on magnetic properties of the nanostructured CoPt particles. / Komogortsev, S. V.; Iskhakov, R. S.; Zimin, A. A.; Filatov, E. Yu ; Korenev, S. V.; Shubin, Yu V.; Chizhik, N. A.; Yurkin, G. Yu; Eremin, E. V.

In: Journal of Magnetism and Magnetic Materials, Vol. 401, 01.03.2016, p. 236-241.

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

TY - JOUR

T1 - The exchange interaction effects on magnetic properties of the nanostructured CoPt particles

AU - Komogortsev, S. V.

AU - Iskhakov, R. S.

AU - Zimin, A. A.

AU - Filatov, E. Yu

AU - Korenev, S. V.

AU - Shubin, Yu V.

AU - Chizhik, N. A.

AU - Yurkin, G. Yu

AU - Eremin, E. V.

PY - 2016/3/1

Y1 - 2016/3/1

N2 - Various manifestations of the exchange interaction effects in magnetization curves of the CoPt nanostructured particles are demonstrated and discussed. The inter-grain exchange constant A in the sponge-like agglomerates of crystallites is estimated as A=(7±1) pJ/m from the approach magnetization to saturation curves that is in good agreement with A=(6.6±0.5) pJ/m obtained from Bloch T 3/2 law. The fractal dimensionality of the exchange coupled crystallite system in the porous media of the disordered CoPt alloy d=(2.60±0.18) was estimated from the approach magnetization to saturation curve. Coercive force decreases with temperature as Hc~T 3/2 which is assumed to be a consequence of the magnetic anisotropy energy reduction due to the thermal spin wave excitations in the investigated CoPt particles.

AB - Various manifestations of the exchange interaction effects in magnetization curves of the CoPt nanostructured particles are demonstrated and discussed. The inter-grain exchange constant A in the sponge-like agglomerates of crystallites is estimated as A=(7±1) pJ/m from the approach magnetization to saturation curves that is in good agreement with A=(6.6±0.5) pJ/m obtained from Bloch T 3/2 law. The fractal dimensionality of the exchange coupled crystallite system in the porous media of the disordered CoPt alloy d=(2.60±0.18) was estimated from the approach magnetization to saturation curve. Coercive force decreases with temperature as Hc~T 3/2 which is assumed to be a consequence of the magnetic anisotropy energy reduction due to the thermal spin wave excitations in the investigated CoPt particles.

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JO - Journal of Magnetism and Magnetic Materials

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