Magnetic relaxation of nanoparticles with cubic and uniaxial anisotropies

8th Brazilian Meeting on Simulational Physics

Correia, Marcos J.^1,2 ; Schwarzacher, Walther^2 ; Chagas, Edson Ferreira^2,3 ; Figueiredo, Wagner^1

Departamento de Física, Universidade Federal de Santa Catarina, Florianópolis

88040-970, Brazil^1

H. H. Wills Physics Laboratory, University of Bristol, Bristol

BS8 1TL, United Kingdom^2

Instituto de Física, Universidade Federal de Mato Grosso, Cuiabá

MT

78060-900, Brazil^3

关键词: Brownian;    Cryoprotectants;    Magnetic nano-particles;    Single domains;    Temperature dependent viscosity;    Uniaxial anisotropy;    Uniaxial magnetic anisotropy;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/686/1/012009/pdf
DOI  :  10.1088/1742-6596/686/1/012009

来源: IOP

【 摘 要 】

We use Monte Carlo methods to simulate the influence of Brownian rotation on the magnetic properties of a system of single-domain magnetic nanoparticles with cubic and uniaxial magnetic anisotropies. The distinguishing feature of the system is a strongly temperature-dependent viscosity. Such a system has been realized experimentally using magnetic nanoparticles suspended in a freeze-concentrated cryoprotectant solution.