Magnetocaloric effect in layer structural Gd-5(SixGe1-x)(4)/Gd composite material

作者：Yue M^*; Zhang J X; Zeng H; Chen H L; Liu X B

来源：Journal of Applied Physics, 2007, 101(9): 09C520.

DOI：10.1063/1.2712298

A series of layer structural composite magnetic refrigerant materials with composition of (Gd5Si2Ge2)(x)(Gd)(y)(Gd5Si1.85Ge2.15)(z) was synthesized via spark plasma sintering technique. The adiabatic temperature change (Delta T-ad) of the composites and of the three individual components was measured directly from 245 to 315 K with a magnetic field change of 1.5 T using a homemade magnetocaloric effect measuring apparatus. For all composites with different x:y:z ratios, their resultant Delta T-ad uniformly peaks at 246, 276, and 296 K, respectively, corresponding to the magnetic transition temperature of the three components. In addition, proper x:y:z ratio can improve both the value and the constancy of Delta T-ad of the composite. Compared with the three components, the value of Delta T-ad of the composites exhibits a more constant tendency, which is more suitable for practical application in room temperature refrigeration, when compared to those of the three components.

• 出版日期2007-5-1
• 单位北京工业大学