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Effect of Mechanical Stresses on the Coercive Force of the Heterophase Non-Interacting Nanoparticles

2012; Trans Tech Publications; Volume: 472-475; Linguagem: Inglês

10.4028/www.scientific.net/amr.472-475.2199

1662-8985

Leonid Afremov, Yury Kirienko,

Characterization and Applications of Magnetic Nanoparticles

The theoretical analysis of the effect of uniaxial stress on the magnetization of the system of noninteracting nanoparticles is done by an example of heterophase particles of maghemite, epitaxially coated with cobalt ferrite. It is shown that stretching leads to a decrease in the coercive force H c , and compression leads to its growth. The residual saturation magnetization I rs of nanoparticles does not change. With increasing of interfacial exchange interaction, coercive force varies nonmonotonically.