Double magnetic phase transitions and magnetotransport anomalies in a\n new compound Gd_\2AgSi_\3

2021/02/08 by Baidyanath Sahu, Sahu, Baidyanath
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic Properties of Alloys #Magnetic and transport properties of perovskites and related materials #Materials Science (cond-mat.mtrl-sci) #Rare-earth and actinide compounds

paper · pdf · doi:10.48550/arxiv.2102.04096

openalex publication_date 2021/02/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Dc and ac-magnetic susceptibility (\χ), specific heat (C_\P),\nelectrical resistivity (\ρ) and magnetoresistance measurements performed on\nthe new polycrystalline compound \Gd₂AgSi₃, crystallizing in the\n\α-\ThSi₂ tetragonal structure, are reported. Two magnetic\nphase transitions were observed in dc and ac susceptibility, specific heat, and\nresistivity measurements at temperatures mathrmT_N1 = 11 K and\n rmT_N2 = 20 K, despite a single site occupied by Gd atom, which is an\nindication of the complex magnetic behavior. \Gd₂AgSi₃ turns out to\nbe one of the rare Gd compound in which a minimum is observed in the\ntemperature dependence of resistivity in the paramagnetic state and also\nnegative magnetoresistance over a wide temperature range (above\n rmT_N2), mimicking the behavior of exotic \Gd₂PdSi₃, in\nthis ternary family. The isothermal magnetic entropy and adiabatic temperature\nchanges reach a value of 9.5 J/kg-K and 7.5 K respectively for the field change\nof 9 T.\n

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