Magnetocaloric behavior and magnetic ordering in MnPdGa
نویسندگان
چکیده
MnPdGa, a compound crystallizing in the ${\mathrm{Ni}}_{2}\mathrm{In}$ structure, is material displaying magnetic ordering near room temperature and potential ambient-temperature magnetocaloric. Screening based on electronic structure calculations suggest that MnPdGa may exhibit high magnetocaloric figure of merit due to its strong magnetostructural coupling. Here we report preparation employ high--resolution synchrotron x-ray diffraction confirm hexagonal ${\mathrm{Ni}}_{2}\mathrm{In}$-type structure. The zero-field ground state shown be conical spin-wave state, defined by long-range modulation conventional antiferromagnet Near Curie temperature, measurements carried out here coupled with fully ferromagnetic can form at elevated temperatures under an applied field. A peak entropy change $\mathrm{\ensuremath{\Delta}}{S}_{M}=\ensuremath{-}3.54\phantom{\rule{0.28em}{0ex}}\mathrm{J}\phantom{\rule{0.28em}{0ex}}{\mathrm{kg}}^{\ensuremath{-}1}\phantom{\rule{4pt}{0ex}}{\mathrm{K}}^{\ensuremath{-}1}$ ($30.1\phantom{\rule{0.16em}{0ex}}\mathrm{mJ}\phantom{\rule{0.16em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}3}\phantom{\rule{0.16em}{0ex}}{\mathrm{K}}^{\ensuremath{-}1}$) measured ${T}_{C}\phantom{\rule{0.16em}{0ex}}=\phantom{\rule{0.16em}{0ex}}315\phantom{\rule{0.16em}{0ex}}\mathrm{K}$ field $H=5\phantom{\rule{0.16em}{0ex}}\mathrm{T}$. exchange-driven, nontrivial found compared somewhat better-studied MnPtGa basis calculations.
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ژورنال
عنوان ژورنال: Physical Review Materials
سال: 2021
ISSN: ['2476-0455', '2475-9953']
DOI: https://doi.org/10.1103/physrevmaterials.5.014414