Effect of particle size distribution on magnetic behavior of nanoparticles with uniaxial anisotropy

被引：0

作者：

S Rizwan Ali ^{[1
]}

Farah Naz ^{[1
]}

Humaira Akber ^{[1
]}

M Naeem ^{[1
]}

S Imran Ali ^{[2
]}

S Abdul Basit ^{[3
]}

M Sarim ^{[3
]}

Sadaf Qaseem ^{[1
]}

机构：

[1] Department of Physics, Federal Urdu University of Arts, Science and Technology

[2] Department of Applied Chemistry and Chemical Technology, University of Karachi

[3] Department of Computer Science, Federal Urdu University of Arts, Science and Technology

来源：

Chinese Physics B | 2018年 / 09期

关键词：

magnetic nanoparticles; Monte Carlo simulations; size distribution; interparticle interaction; hysteresis;

D O I：

暂无

中图分类号：

TB383.1 [];

学科分类号：

070205 ; 080501 ; 1406 ;

摘要：

The effect of particle size distribution on the field and temperature dependence of the hysteresis loop features like coercivity(HC), remanence(MR), and blocking temperature(TB) is simulated for an ensemble of single domain ferromagnetic nanoparticles with uniaxial anisotropy. Our simulations are based on the two-state model for T < TBand the metropolis Monte-Carlo method for T > TB. It is found that the increase in the grain size significantly enhances HCand TB. The presence of interparticle exchange interaction in the system suppresses HCbut causes MRto significantly increase.Our results show that the parameters associated with the particle size distribution(Dd,δ) such as the mean particle size d and standard-deviation δ play key roles in the magnetic behavior of the system.

引用

页码：576 / 580

页数：5