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 journalArticlepeer-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 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.

Original languageEnglish
Pages (from-to)236-241
Number of pages6
JournalJournal of Magnetism and Magnetic Materials
Volume401
DOIs
Publication statusPublished - 1 Mar 2016

Fingerprint Dive into the research topics of 'The exchange interaction effects on magnetic properties of the nanostructured CoPt particles'. Together they form a unique fingerprint.

Cite this