La(Fe,Si)13-based magnetic refrigerants obtained by novel processing routes (vol 320, pg 2252, 2008)

[摘要] The structure and magnetic properties of LaFe13-xSix and Co-substituted LaFe11.8-xCoxSi1.2 alloys prepared by melt spinning, as well as of LaFe11.57Si1.43Hx hydrides prepared by reactive milling are investigated. The hysteresis in the temperature- and field-induced phase transitions is significantly reduced as compared with conventional bulk alloys, which makes these materials very attractive for magnetic refrigerant applications. The unusual combination of features characteristic of first- and second-order phase transitions in the La(Fe,Si)(13)-based compounds is discussed on the basis of density functional electronic structure calculations. (C) 2008 Elsevier B.V. All rights reserved.

[发布日期] 2009-11-01

[关键词] Magnetocaloric effect;Magnetic efrigeration;La-Fe-Si;La-Fe-Co-Si;Hydrides