Magnetic anisotropy, first-order-like metamagnetic transitions, and large negative magnetoresistance in single-crystal Gd 2 PdSi 3
Shanta Saha,Hitoshi Sugawara,Tatsuma D. Matsuda,Hideyuki Sato,Roop Mallik,E. V. Sampathkumaran +5 more
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In this article, a single-crystal Gd alloys with a hexagonal hexagonal structure were reported, and a well-defined minimum in electrical resistivity, magnetoresistance, magnetization, thermopower, and Hall effect measurements were obtained.Abstract:
Electrical resistivity (\ensuremath{\rho}), magnetoresistance (MR), magnetization, thermopower, and Hall-effect measurements on the single-crystal ${\mathrm{Gd}}_{2}{\mathrm{PdSi}}_{3},$ crystallizing in an ${\mathrm{AlB}}_{2}$-derived hexagonal structure, are reported. The well-defined minimum in \ensuremath{\rho} at a temperature above N\'eel temperature ${(T}_{N}=21\mathrm{K})$ and large negative MR below $\ensuremath{\sim}{3T}_{N},$ 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 an $S$-state ion.read more
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Colossal Magnetoresistant Materials: The Key Role of Phase Separation
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Magnetic Skyrmion Materials.
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Skyrmion Crystal from RKKY Interaction Mediated by 2D Electron Gas.
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Formation Mechanism of the Helical Q Structure in Gd-Based Skyrmion Materials.
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