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Giant Magnetoresistance and Field-induced Phase Transitions in Tb7Rh3 Single Crystal
Takanori Tsutaoka,Koji Shimomura,Nikolai V. Baranov,Alexey V. Proshkin,Evgeny G. Gerasimov,Pavel B. Terentev 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
High-field magnetization and magnetoresistance measurements have been performed to investigatethe field-induced magnetic phase transitions in Tb7Rh3 single crystals. Metamagnetic transitionswere observed along the a-, b- and c-axes of the hexagonal crystal lattice in the three magneticstates at temperatures below the N´eel temperature TN = 91 K; magnetic field H - temperatureT phase diagrams were constructed for b- and c- axes. At temperatures below TN, the magneticstructure transformations under application of a magnetic field along the b-axis are observed to beaccompanied by the giant magnetoresistance effect (|Δρ/ρ| up to 65%). Magnetization curves measuredat temperatures above TN show inflection points, which may be indicative of phase transitionswithin regions with an antiferromagnetic short-range order persisting in a paramagnetic matrix.