Reduction in hysteresis losses and large magnetic entropy change in the B-doped La(Fe, Si)(13) compounds RID G-6874-2011

Author:

Shen, Jun  Wang, Fang  Zhao, Jin-Liang  Wu, Jian-Feng  Gong, Mao-Qiong  Hu, Feng-Xia  Li, Yang-Xian  Sun, Ji-Rong  Shen, Bao-Gen  

Journal:

JOURNAL OF APPLIED PHYSICS

Issue Date:

2010

Abstract(summary):

The effect of the B-addition on magnetic entropy change Delta S(M) and hysteresis loss in La(Fe, Si)(13) is studied. The maximal values of Delta S(M) for LaFe(11.9)Si(1.1), LaFe(11.5)B(0.4)Si(1.1), LaFe(11.5)Si(1.5), and LaFe(11.0)B(0.5)Si(1.5) are found to be 27.0, 26.1, 23.7, and 21.2 J/kg K at Curie temperature T(C) for a field change in 0-5 T, respectively. The maximal hysteresis losses around T(C) are 43 and 21 J/kg for LaFe(11.9)Si(1.1) and LaFe(11.5)Si(1.5), respectively, while almost no magnetic hysteresis is observed for the B-doped compounds. Our result reveals that a large Delta S(M) and a small hysteresis loss can be simultaneously achieved in NaZn(13)-type La(Fe, Si)(13) compounds by the addition of B. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3349325]