Investigation of magneto-anisotropy field for system of particles with near superparamagnetic volume |
| |
| Authors: | LP Ol’khovik AS Kamzin EL Karyakina ZI Sizova EV Shurinova |
| |
| Institution: | 1. Karazin Kharkov National University, Svobody Sqr. 4, Kharkov 61077, Ukraine;2. Ioffe Physico-Technical Institute of Russian Academy of Sciences, Polytekhnicheskaya Str. 26, St Petersburg 194021, Russian Federation;3. Berejnoy Ukrainian Science-Research Institute of Refractory Materials, Gudanova Str. 18, Kharkov 61024, Ukraine |
| |
| Abstract: | We obtained the temperature dependence for low-field boundary of the anisotropy field distribution in a system of barium hexaferrite nanocrystals in the temperature range from 300 to 700 K. We treated the experimental data taking into account the influence of thermal fluctuations on the anisotropy field and the transition of particles into the paramagnetic state, stimulated by external magnetic field. We showed that the dependence under consideration is formed by particles of different volume, which increased from 3.5×10−18 to 40×10−18 cm3 while the particles lost their magnetic stability with the temperature growth. |
| |
| Keywords: | 75 50 Tt 75 30 Gw |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
