Magnetic properties of Sm<sub>5</sub>Fe<sub>17</sub> melt-spun ribbons and their borides

Tetsuji Saito; Daisuke Nishio-Hamane; Tetsuji Saito; Daisuke Nishio-Hamane

doi:10.3934/matersci.2015.4.392

AIMS Materials Science

2015, Volume 2, Issue 4: 392-400. doi: 10.3934/matersci.2015.4.392

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Magnetic properties of Sm₅Fe₁₇ melt-spun ribbons and their borides

Tetsuji Saito ^{1
,
,},
Daisuke Nishio-Hamane ²

1.
Department of Mechanical Science and Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan;
2.
Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan

Received: 24 August 2015 Accepted: 20 October 2015 Published: 22 October 2015

Sm₅Fe₁₇ melt-spun ribbons exhibited low coercivity and partly or mostly consisted of the amorphous phase. Annealing of Sm₅Fe₁₇ melt-spun ribbon resulted in the formation of the Sm₅Fe₁₇ phase. The annealed Sm₅Fe₁₇ melt-spun ribbon exhibited a high coercivity. It was found that the addition of B to the Sm₅Fe₁₇ alloy resulted in the promotion of the Sm₂Fe₁₄B phase. Annealed Sm₅Fe₁₇B_x (x = 0.5) melt-spun ribbons consisted of the Sm₅Fe₁₇phase together with the Sm₂Fe₁₄B and SmFe₂ phases. On the other hand, annealed Sm₅Fe₁₇B_x (x = 1.0-1.5) melt-spun ribbons consisted of the Sm₂Fe₁₄B and SmFe₂ phases without the Sm₅Fe₁₇phase. The resultant Sm₅Fe₁₇B_x (x = 1.0-1.5) melt-spun ribbons still showed a coercivity of around 2 kOe. The annealed Sm₅Fe₁₇ melt-spun ribbon exhibited a high coercivity over 25 kOe and a remanence of 40 emu/g, whereas the annealed Sm₅Fe₁₇B_1.0 melt-spun ribbon exhibited a high remanence of 65 emu/g and a coercivity of 2.0 kOe.
- Sm-Fe alloys,
- rare-earth magnet,
- melt-spinning,
- coercivity,
- microstructures
Citation: Tetsuji Saito, Daisuke Nishio-Hamane. Magnetic properties of Sm5Fe17 melt-spun ribbons and their borides[J]. AIMS Materials Science, 2015, 2(4): 392-400. doi: 10.3934/matersci.2015.4.392

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Abstract

Sm₅Fe₁₇ melt-spun ribbons exhibited low coercivity and partly or mostly consisted of the amorphous phase. Annealing of Sm₅Fe₁₇ melt-spun ribbon resulted in the formation of the Sm₅Fe₁₇ phase. The annealed Sm₅Fe₁₇ melt-spun ribbon exhibited a high coercivity. It was found that the addition of B to the Sm₅Fe₁₇ alloy resulted in the promotion of the Sm₂Fe₁₄B phase. Annealed Sm₅Fe₁₇B_x (x = 0.5) melt-spun ribbons consisted of the Sm₅Fe₁₇phase together with the Sm₂Fe₁₄B and SmFe₂ phases. On the other hand, annealed Sm₅Fe₁₇B_x (x = 1.0-1.5) melt-spun ribbons consisted of the Sm₂Fe₁₄B and SmFe₂ phases without the Sm₅Fe₁₇phase. The resultant Sm₅Fe₁₇B_x (x = 1.0-1.5) melt-spun ribbons still showed a coercivity of around 2 kOe. The annealed Sm₅Fe₁₇ melt-spun ribbon exhibited a high coercivity over 25 kOe and a remanence of 40 emu/g, whereas the annealed Sm₅Fe₁₇B_1.0 melt-spun ribbon exhibited a high remanence of 65 emu/g and a coercivity of 2.0 kOe.

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