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Field-induced phase transitions and giant magnetoresistance in Dy D{y_3}CoCo single crystals |
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| Authors: | N.V. Baranov E. Bauer R. Hauser A. Galatanu Y. Aoki H. Sato |
| Affiliation: | Inst.of Phys.and Applied Math.,Ural State Univ., 620083, Ekaterinburg, Russia Institut für Experimentalphysik, Technische Universit?t Wien, 1040, Wien, Austria National Institute for Materials Physics, 76900, Bucharest-Magurele, Romania Department of Physics, Tokyo Metropolitan University, 192-0397, Tokyo, Japan |
| Abstract: | Electrical resistivity and calorimetric measurements on Dy 3 Coshow that below the Néel temperature (T N =44 K) the non-collinear antiferromagnetic structure exhibits field-induced magnetic phase transitions of a first-order type along all principal axes, accompanied by a strongly anisotropic giant magnetoresistance and by a change of the Sommerfeld coefficient of the specific heat. Quantum tunnelling of the magnetization appears to be possible for T < 0.6 K. Received 15 July 1999 and Received in final form 6 December 1999 |
| Keywords: | PACS. 72.15.Eb Electrical and thermal conduction in crystalline metals and alloys - 75.30.Kz Magnetic phase boundaries (including magnetic transitions metamagnetism etc.) - 75.40.-s Critical-point effects specific heats short-range order |
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