Magnetic anisotropy, first-order-like metamagnetic transitions and large negative magnetoresistance in the single crystal of Gd$_{2}$PdSi$_3$

S. R. Saha; H. Sugawara; T. D. Matsuda; H. Sato; R. Mallik; E. V. Sampathkumaran

doi:10.1103/PhysRevB.60.12162

paper

Magnetic anisotropy, first-order-like metamagnetic transitions and large negative magnetoresistance in the single crystal of Gd $_{2}$ PdSi $_{3}$

arXiv:cond-mat/9908128 · doi:10.1103/PhysRevB.60.12162

Abstract

Electrical resistivity ( $ρ$ ), magnetoresistance (MR), magnetization, thermopower and Hall effect measurements on the single crystal Gd $_{2}$ PdSi $_{3}$ , crystallizing in an AlB $_{2}$ -derived hexagonal structure are reported. The well-defined minimum in $ρ$ at a temperature above Néel temperature (T $_{N}$ = 21 K) and large negative MR below $\sim$ 3T $_{N}$ , reported earlier for the polycrystals, are reproducible even in single crystals. Such features are generally uncharacteristic of Gd alloys. In addition, we also found interesting features in other data, e.g., two-step first-order-like metamagnetic transitions for the magnetic field along [0001] direction. The alloy exhibits anisotropy in all these properties, though Gd is a S-state ion.

RevTeX, 5 pages, 6 encapsulated postscript figures; scheduled to be published in Phy. Rev. B (01 November 1999, B1)

Magnetic anisotropy, first-order-like metamagnetic transitions and large negative magnetoresistance in the single crystal of Gd2​PdSi3​

Abstract

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Magnetic anisotropy, first-order-like metamagnetic transitions and large negative magnetoresistance in the single crystal of Gd $_{2}$ PdSi $_{3}$