skip to main content

Title: The effects of interstitial atoms H and B on magnetic properties and magnetocaloric effect in LaFe{sub 11.5}Al{sub 1.5} compound

The changes in magnetic properties of LaFe{sub 11.5}Al{sub 1.5}H{sub x} and LaFe{sub 11.5}Al{sub 1.5}B{sub y} have been investigated. By introducing interstitial atoms H or B, the magnetic ground state is changed from the antiferromagnetic to the ferromagnetic state, accompanied by significant increases in the saturated magnetization (Ms) and the Curie temperature (T{sub C}). An attractive feature is that the magnetic transition from the second-order to the weakly first-order with increasing hydrogen content compared to the magnetic transition from the weakly first-order to the second-order with increasing boron content. The maximum magnetic entropy change (−ΔS{sub M}) under a field change of 0–5 T increases from 10.1 J/kg · K for hydrogen content x = 0.12 to 12.3 J/kg · K for x = 1.3, while decreases from 9.6 J/kg · K for boron content y = 0.1 to 9.2 J/kg · K for y = 0.3.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ; ;  [4]
  1. College of Applied Sciences, Beijing University of Technology, Beijing 100124 (China)
  2. (China)
  3. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)
  4. College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124 (China)
Publication Date:
OSTI Identifier:
22275545
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 18; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM; ANTIFERROMAGNETISM; BORON; COMPARATIVE EVALUATIONS; CURIE POINT; ENTROPY; FERROMAGNETISM; GROUND STATES; HYDROGEN; INTERMETALLIC COMPOUNDS; INTERSTITIALS; IRON; LANTHANUM; MAGNETIC PROPERTIES; MAGNETIZATION