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

doi:10.1088/1674-1056/27/9/097503

中国物理B ›› 2018, Vol. 27 ›› Issue (9): 97503-097503.doi: 10.1088/1674-1056/27/9/097503

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

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

S Rizwan Ali, Farah Naz, Humaira Akber, M Naeem, S Imran Ali, S Abdul Basit, M Sarim, Sadaf Qaseem

1 Department of Physics, Federal Urdu University of Arts, Science and Technology, Karachi, Pakistan;
2 Department of Applied Chemistry and Chemical Technology, University of Karachi, Karachi, Pakistan;
3 Department of Computer Science, Federal Urdu University of Arts, Science and Technology, Karachi, Pakistan

收稿日期:2018-04-10 修回日期:2018-06-29 出版日期:2018-09-05 发布日期:2018-09-05
通讯作者: S Rizwan Ali E-mail:rizwan@fuuast.edu.pk

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

S Rizwan Ali¹, Farah Naz¹, Humaira Akber¹, M Naeem¹, S Imran Ali², S Abdul Basit³, M Sarim³, Sadaf Qaseem¹

1 Department of Physics, Federal Urdu University of Arts, Science and Technology, Karachi, Pakistan;
2 Department of Applied Chemistry and Chemical Technology, University of Karachi, Karachi, Pakistan;
3 Department of Computer Science, Federal Urdu University of Arts, Science and Technology, Karachi, Pakistan

Received:2018-04-10 Revised:2018-06-29 Online:2018-09-05 Published:2018-09-05
Contact: S Rizwan Ali E-mail:rizwan@fuuast.edu.pk

摘要/Abstract

摘要：

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

关键词: magnetic nanoparticles, Monte Carlo simulations, size distribution, interparticle interaction, hysteresis

Abstract:

Key words: magnetic nanoparticles, Monte Carlo simulations, size distribution, interparticle interaction, hysteresis

中图分类号: (Fine-particle systems; nanocrystalline materials)

75.50.Tt

75.40.Mg (Numerical simulation studies) 75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)

S Rizwan Ali, Farah Naz, Humaira Akber, M Naeem, S Imran Ali, S Abdul Basit, M Sarim, Sadaf Qaseem. Effect of particle size distribution on magnetic behavior of nanoparticles with uniaxial anisotropy[J]. 中国物理B, 2018, 27(9): 97503-097503.

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

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

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