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- W3113133766 abstract "We present an experimental investigation of the magnetic and magnetocaloric properties of sputtered epitaxial and amorphous Tb thin films. We grew epitaxial Nb (50-nm)/Tb (100-nm) bilayer thin films on ${mathrm{Al}}_{2}{mathrm{O}}_{3}(11overline{2}0$) substrate using DC magnetron sputtering at high temperature, with excellent crystalline quality of the hcp Tb(0001) layer. While the amorphous Tb thin film exhibits more isotropic magnetocaloric properties, we show that the epitaxial Tb thin film displays large anisotropic magnetocaloric properties, with a large maximum magnetic entropy change of $6.27phantom{rule{0.28em}{0ex}}mathrm{J}phantom{rule{0.16em}{0ex}}{mathrm{kg}}^{ensuremath{-}1}phantom{rule{0.16em}{0ex}}{mathrm{K}}^{ensuremath{-}1}$ at the N'eel temperature as well as a large relative cooling power of $225phantom{rule{0.28em}{0ex}}mathrm{J}phantom{rule{0.16em}{0ex}}{mathrm{kg}}^{ensuremath{-}1}$ with a magnetic field change $mathrm{ensuremath{Delta}}H=20phantom{rule{0.28em}{0ex}}mathrm{kOe}$ applied along the in-plane direction. These large and anisotropic magnetocaloric properties are much larger than those measured for the amorphous Tb thin film, or previously reported for Tb-based thin-film structures. Our findings highlight the opportunities for growing epitaxial rare-earth thin films using sputtering techniques and demonstrate the importance of crystallographic control on the magnetocaloric effect in Tb thin films." @default.
- W3113133766 created "2020-12-21" @default.
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- W3113133766 date "2020-12-10" @default.
- W3113133766 modified "2023-10-09" @default.
- W3113133766 title "Large anisotropic magnetocaloric effect in all-sputtered epitaxial terbium thin films" @default.
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- W3113133766 doi "https://doi.org/10.1103/physrevmaterials.4.124404" @default.
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