Title :
Electrical and magnetotransport properties of canted antiferromagnet Dy/sub 5/Si/sub 2/Ge/sub 2/
Author :
Nirmala, R. ; Sankaranarayanan, V. ; Sethupathi, K. ; Morozkin, A.V. ; Chu, Z. ; Yelon, W.B. ; Malik, S.K. ; Prasad, V. ; Subramanyam, S.V.
Author_Institution :
Dept. of Phys., Indian Inst. of Technol., Chennai, India
Abstract :
Summary form only given. Since the giant magnetocaloric effect is encountered in a ferromagnetic Gd/sub 5/Si/sub 2/Ge/sub 2/ alloy near room temperature it is considered as a suitable material for magnetic refrigerator applications. Also a commensurate structural transition occurs at the magnetic transition temperature and there is a good correlation between the crystal structure and magnetic properties. Such observations have triggered numerous experimental studies on similar rare earth alloys and compounds. We have synthesized its Dy- analogue, namely, Dy/sub 5/Si/sub 2/Ge/sub 2/ and have characterized it by means of room temperature X-ray diffraction, ac magnetic susceptibility (15 K - 300 K), electrical resistivity (at zero field and at 6 T), thermoelectric power (15 K - 300 K) and neutron diffraction (at 300 K and 9.2 K) experiments.
Keywords :
Ge-Si alloys; X-ray diffraction; antiferromagnetic materials; canted spin arrangements; crystal structure; dysprosium alloys; electrical resistivity; magnetic susceptibility; magnetoresistance; neutron diffraction; thermoelectric power; 0 T; 15 to 300 K; 6 T; 9.2 K; Dy/sub 5/Si/sub 2/Ge/sub 2/; ac magnetic susceptibility; canted antiferromagnet; crystal structure; electrical properties; electrical resistivity; giant magnetocaloric effect; magnetic properties; magnetic transition temperature; magnetotransport properties; neutron diffraction; room temperature X-ray diffraction; thermoelectric power; Antiferromagnetic materials; Crystalline materials; Germanium alloys; Iron alloys; Magnetic materials; Magnetic properties; Refrigeration; Silicon alloys; Temperature; X-ray diffraction;
Conference_Titel :
Magnetics Conference, 2002. INTERMAG Europe 2002. Digest of Technical Papers. 2002 IEEE International
Conference_Location :
Amsterdam, The Netherlands
Print_ISBN :
0-7803-7365-0
DOI :
10.1109/INTMAG.2002.1001082
