A Simple Analytical Model for Magnetization and Coercivity of Hard/Soft Nanocomposite Magnets

Jihoon Park; Yang-Ki Hong; Woncheol Lee; Seong-Gon Kim; Chuangbing Rong; Narayan Poudyal; J Ping Liu; Chul-Jin Choi

doi:10.1038/s41598-017-04632-6

A Simple Analytical Model for Magnetization and Coercivity of Hard/Soft Nanocomposite Magnets

Sci Rep. 2017 Jul 10;7(1):4960. doi: 10.1038/s41598-017-04632-6.

Authors

Jihoon Park^{1

2}, Yang-Ki Hong³, Woncheol Lee¹, Seong-Gon Kim⁴, Chuangbing Rong⁵, Narayan Poudyal⁵, J Ping Liu⁵, Chul-Jin Choi²

Affiliations

¹ Department of Electrical and Computer Engineering and MINT Center, The University of Alabama Tuscaloosa, Alabama, 35487, USA.
² Powder and Ceramics Division, Korea Institute of Materials Science, Changwon, 51508, Republic of Korea.
³ Department of Electrical and Computer Engineering and MINT Center, The University of Alabama Tuscaloosa, Alabama, 35487, USA. ykhong@eng.ua.edu.
⁴ Department of Physics & Astronomy and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi, 39762, USA.
⁵ Department of Physics, University of Texas at Arlington, Arlington, Texas, 76019, USA.

Abstract

We present a simple analytical model to estimate the magnetization (σ _s) and intrinsic coercivity (H _ci) of a hard/soft nanocomposite magnet using the mass fraction. Previously proposed models are based on the volume fraction of the hard phase of the composite. However, it is difficult to measure the volume of the hard or soft phase material of a composite. We synthesized Sm₂Co₇/Fe-Co, MnAl/Fe-Co, MnBi/Fe-Co, and BaFe₁₂O₁₉/Fe-Co composites for characterization of their σ _s and H _ci. The experimental results are in good agreement with the present model. Therefore, this analytical model can be extended to predict the maximum energy product (BH)_max of hard/soft composite.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.
Research Support, Non-U.S. Gov't