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Chin. Phys. B, 2009, Vol. 18(10): 4506-4510    DOI: 10.1088/1674-1056/18/10/067
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Hydrogen absorption of LaFe11.5Si1.5 compound under low hydrogen gas pressure

Fu Bin(傅斌)a)†, Long Yi(龙毅)a), Shi Pu-Ji(史普辑)a), Ma Tao(马涛)a), Bao Bo(鲍博)a), Yan A-Ru(闫阿儒)b), and Chen Ren-Jie(陈仁杰)b)
a School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China; b Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Abstract  Hydrogen absorptions of LaFe11.5Si1.5 compound in 1-atm hydrogen gas at different temperatures are investigated. The hydrogen content in the hydrogenated sample does not increase with the increase of temperature of hydrogen absorption but changes complicatedly. The characteristic of first-order transition in LaFe11.5Si1.5 compound is weakened after hydrogen absorption. It leads the peaks of magnetic entropy to become wider and the hysteresis loss to reduce significantly, but relative cooling power (RCP) is not changed considerably.
Keywords:  magnetic refrigerant      Curie temperature      hydrogen absorption temperature      magne-tocaloric effect  
Received:  30 March 2009      Revised:  04 May 2009      Accepted manuscript online: 
PACS:  75.30.Sg (Magnetocaloric effect, magnetic cooling)  
  75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))  
  75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)  
Fund: Project supported by the National Basic Research Program of China (Grant No 2006CB601101), the National High Technology Research and Development Program of China (Grant No 2007AA03Z440), and the National Natural Science Foundation of China (Grant No 50731

Cite this article: 

Fu Bin(傅斌), Long Yi(龙毅), Shi Pu-Ji(史普辑), Ma Tao(马涛), Bao Bo(鲍博), Yan A-Ru(闫阿儒), and Chen Ren-Jie(陈仁杰) Hydrogen absorption of LaFe11.5Si1.5 compound under low hydrogen gas pressure 2009 Chin. Phys. B 18 4506

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