https://doi.org/10.1007/s100510070250
Field-induced phase transitions and giant magnetoresistance in Dy3Co single crystals
1
Inst. of Phys. and Applied Math., Ural State Univ., 620083 Ekaterinburg, Russia
2
Institut für Experimentalphysik, Technische Universität Wien, 1040 Wien, Austria
3
National Institute for Materials Physics, 76900 Bucharest-Magurele, Romania
4
Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397, Japan
Corresponding author: a bauer@xphys.tuwien.ac.at
Received:
15
July
1999
Revised:
6
December
1999
Published online: 15 July 2000
Electrical resistivity and calorimetric measurements on Dy3Co show that below the Néel temperature (TN=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.
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
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000
