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首页> 外文期刊>IEEE Transactions on Magnetics >Magnetic Properties of ${{hbox{Sm}}hbox{-}{hbox{Co}}/alpha hbox{-}{hbox{Fe}}}$ Nanocomposite Thick Film-Magnets at Room and High Temperatures
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Magnetic Properties of ${{hbox{Sm}}hbox{-}{hbox{Co}}/alpha hbox{-}{hbox{Fe}}}$ Nanocomposite Thick Film-Magnets at Room and High Temperatures

机译：在室温和高温下$ {{hbox {Sm}} hbox {-} {hbox {Co}} / alpha hbox {-} {hbox {Fe}}} $纳米复合厚膜磁体的磁性

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摘要

${{hbox{Sm}}_{rm x}{hbox{Co}}_{5}/ alphahbox{-}{hbox{Fe}}}$ multilayered structures were synthesized by the pulsed laser deposition (PLD) method from rotating composite targets composed of ${{hbox{Sm}}_{rm x}{hbox{Co}}_{5}}$ (${{rm x} = 1-5}$) and ${alphahbox{-}{hbox{Fe}}}$ segments. The deposited films were approximately ${10~muhbox{m}}$ in thickness. Transmission electron microscopy observations revealed that as-deposited films were composed of Sm-Co and ${alphahbox{-}{hbox{Fe}}}$ layers, 780 layers in total, with the well-controlled thickness of approximately 10 nm, and they are crystallized into structures composed of Sm-Co and ${{alphahbox{-}{hbox{Fe}}}}$ nanograins. The ${(BH)_{max}}$ versus ${{hbox{Sm}}/{({hbox{Sm}}+{hbox{Co}})}}$ curve at room temperature showed clear peaks and the ${(BH)_{max}}$ value of ${{100~hbox{kJ/m}^3}}$ was obtained. Although the obtained ${(BH)_{max}}$ value of ${{hbox{Sm}}hbox{-}{hbox{Co}}/alphahbox{-}{hbox{Fe}}}$ nanocomposite thick film-magnets was comparable to that of ${{hbox{Nd}}hbo- {-}{hbox{Fe}}hbox{-}{hbox{B}}/alphahbox{-}{hbox{Fe}}}$ at room temperature, it exceeded those of ${{hbox{Nd}}hbox{-}{hbox{Fe}}hbox{-}{hbox{B}}/alphahbox{-}{hbox{Fe}}}$ nanolayered magnets and rapidly quenched (Nd, Dy)-Fe-B flakes at 150 ${^circ{hbox{C}}}$ . The large ${(BH)_{max}}$ value of the ${{hbox{Sm}}hbox{-}{hbox{Co}}/alphahbox{-}{hbox{Fe}}}$ nanocomposite thick film-magnet at 150 ${^circ{hbox{C}}}$ can be attributed to its small temperature coefficient of coercivity, ${-0.34%/ ^circ{hbox{C}}}$.
机译：$ {{hbox {Sm}} _ {rm x} {hbox {Co}} _ {5} / alphahbox {-} {hbox {Fe}}} $$的多层结构是通过脉冲激光沉积（PLD）方法由旋转由$ {{hbox {Sm}} _ {rm x} {hbox {Co}} _ {5}} $（$ {{rm x} = 1-5} $）和$ {alphahbox {- } {hbox {Fe}}} $个细分。沉积的膜的厚度约为$ {10〜muhbox {m}} $。透射电子显微镜观察表明，沉积后的薄膜由Sm-Co和$ {alphahbox {-} {hbox {Fe}}} $层组成，总共780层，厚度控制良好，约为10 nm，并且它们被结晶成由Sm-Co和$ {{alphahbox {-} {hbox {Fe}}}} $$纳米颗粒组成的结构。室温下的$ {（BH）_ {max}} $与$ {{hbox {Sm}} / {（{hbox {Sm}} + {hbox {Co}}}}}} $曲线显示了清晰的峰值，获得了$ {{100〜hbox {kJ / m} ^ 3}} $的$ {（BH）_ {max}} $值。尽管获得了$ {{hbox {Sm}} hbox {-} {hbox {Co}} / alphahbox {-} {hbox {Fe}}} $$纳米复合厚膜的$ {（BH）_ {max}} $值-magnets与$ {{hbox {Nd}} hbo- {-} {hbox {Fe}} hbox {-} {hbox {B}} / alphahbox {-} {hbox {Fe}}} $室温下，它超过了$ {{hbox {Nd}} hbox {-} {hbox {Fe}} hbox {-} {hbox {B}} / alphahbox {-} {hbox {Fe}}} $$纳米磁体的温度并以150 $ {^ circ {hbox {C}}} $$的速度快速淬火（Nd，Dy）-Fe-B薄片。 $ {{hbox {Sm}} hbox {-} {hbox {Co}} / alphahbox {-} {hbox {Fe}}} $$纳米复合厚膜的$ {（BH）_ {max}} $大值磁铁在150 $ {^ circ {hbox {C}}} $时可归因于其较小的矫顽力温度系数$ {-0.34％/ ^ circ {hbox {C}}} $。

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