Dynamical measurement of domain-wall nucleation and annihilation in individual amorphous Co particles

Article

关键词: MAGNETIZATION PROCESSES;    PERMALLOY PARTICLES;    REVERSAL;   

DOI  :  10.1103/PhysRevB.53.3341

来源: SCIE

【 摘 要 】

We present magnetization measurements of individual amorphous Co particles (300 nmx200 nmx30 nm) patterned by electron-beam lithography. The hysteresis loops show mainly two magnetization jumps corresponding to domain-wall nucleation and annihilation. The angular dependence of these magnetization jumps is measured and the temperature dependence (0.1-6 K) of the nucleation and the annihilation processes is investigated by two independent methods: switching field and switching time measurements. Finally we compare the results obtained on one particle with those of an array of about 2x10(7) particles. We show experimentally that the dynamical properties measured on individual particles are connected with an unusual 1/T relaxation of the array of particles.

【 授权许可】

Free