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- W2889331449 abstract "The critical properties and magnetocaloric effect of semiconducting ferrimagnet ${mathrm{Mn}}_{3}{mathrm{Si}}_{2}{mathrm{Te}}_{6}$ single crystals have been investigated by bulk magnetization and heat capacity around ${T}_{c}$. Critical exponents $ensuremath{beta}=0.41ifmmodepmelsetextpmfi{}0.01$ with a critical temperature ${T}_{c}=74.18ifmmodepmelsetextpmfi{}0.08phantom{rule{0.16em}{0ex}}mathrm{K}$ and $ensuremath{gamma}=1.21ifmmodepmelsetextpmfi{}0.02$ with ${T}_{c}=74.35ifmmodepmelsetextpmfi{}0.05phantom{rule{0.16em}{0ex}}mathrm{K}$ are deduced by the Kouvel-Fisher plot, whereas $ensuremath{delta}=4.29ifmmodepmelsetextpmfi{}0.05(3.40ifmmodepmelsetextpmfi{}0.02)$ is obtained by a critical isotherm analysis at $T=74(75)phantom{rule{0.16em}{0ex}}mathrm{K}$. The magnetic exchange distance is found to decay as $J(r)ensuremath{approx}{r}^{ensuremath{-}4.79}$, which lies between the mean-field and 3D Heisenberg models. Moreover, the magnetic entropy change $ensuremath{-}mathrm{ensuremath{Delta}}{S}_{M}$ features a maximum at ${T}_{c}$, i.e., $ensuremath{-}mathrm{ensuremath{Delta}}{S}_{M}^{mathrm{max}}ensuremath{sim}2.53(1.67)phantom{rule{0.28em}{0ex}}mathrm{J}phantom{rule{0.16em}{0ex}}{mathrm{kg}}^{ensuremath{-}1}phantom{rule{0.16em}{0ex}}{mathrm{K}}^{ensuremath{-}1}$ with in-plane (out-of-plane) field change of 5 T, confirming large magnetic anisotropy. The heat capacity measurement further gives $ensuremath{-}mathrm{ensuremath{Delta}}{S}_{M}^{mathrm{max}}phantom{rule{4pt}{0ex}}ensuremath{sim}2.94phantom{rule{0.28em}{0ex}}mathrm{J}phantom{rule{0.16em}{0ex}}{mathrm{kg}}^{ensuremath{-}1}phantom{rule{0.16em}{0ex}}{mathrm{K}}^{ensuremath{-}1}$ and the corresponding adiabatic temperature change $mathrm{ensuremath{Delta}}{T}_{ad}phantom{rule{4pt}{0ex}}ensuremath{sim}1.14phantom{rule{0.16em}{0ex}}mathrm{K}$ with out-of-plane field change of 9 T." @default.
- W2889331449 created "2018-09-07" @default.
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- W2889331449 date "2018-08-27" @default.
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- W2889331449 title "Critical behavior and magnetocaloric effect in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi>Mn</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>Si</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Te</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:mrow></mml:math>" @default.
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- W2889331449 doi "https://doi.org/10.1103/physrevb.98.064423" @default.
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