| CRYSTALLOGRAPHIC STRUCTURE AND MAGNETIC PROPERTIES OF R_(2)Fe_(17)N_(2.4) |
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| 作者姓名： | 杨应昌 葛森林 张晓东 孔麟书 潘琪 杨继廉 张百生 丁永凡 叶春堂 |
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| 作者单位： | Department of Physics，Peking University，Beijing 100871，PRC，Department of Physics，Peking University，Beijing 100871，PRC，Department of Physics，Peking University，Beijing 100871，PRC，Department of Physics，Peking University，Beijing 100871，PRC，Department of Physics，Peking University，Beijing 100871，PRC，Institute of Atomic Energy，Academia Sinica，Beijing 102413，PRC，Institute of Atomic Energy，Academia Sinica，Beijing 102413，PRC，Institute of Atomic Energy，Academia Sinica，Beijing 102413，PRC，Institute of Atomic Energy，Academia Sinica，Beijing 102413，PRC |
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| 基金项目： | Project supported by the National Natural Science Foundation of China and the Open Magnetism Laboratory. |
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| 摘 要： | By a proper thermal treatment, the nitrogen atoms can enter the R2Fe17 structure. The crystallographic and intrinsic magnetic properties as well as their relationship have been studied by magnetic measurements, X-ray and neutron diffraction techniques. The neutron data indicate that the nitrogen atoms occupy the interstitial sites in the Th2Zn17-type rhom-bohedral structure. The inserting nitrogen atoms are found to dilate the cell volume, increase the Curie temperature and enhance the saturation moment by raising the difference in the electron number between the spin-up and spin-down 3d subbands of the Fe atoms. Furthermore, the nitrogen atoms have an important effect on the magnetocrystallic anisotropy, which results in an easy axis with Sm2Fe17N2.4. All these make Sm2Fe17N2.4 favorable for permanent magnet applications.
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CRYSTALLOGRAPHIC STRUCTURE AND MAGNETIC PROPERTIES OF R_(2)Fe_(17)N_(2.4) |
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| YANG YING-CHANG GE SEN-LIN ZHANG XIAO-DONG KONG LIN-SHU PAN QI.CRYSTALLOGRAPHIC STRUCTURE AND MAGNETIC PROPERTIES OF R_(2)Fe_(17)N_(2.4)[J].Science in China(Chemistry),1991(11). |
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| Authors: | YANG YING-CHANG GE SEN-LIN ZHANG XIAO-DONG KONG LIN-SHU PAN QI |
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| Abstract: | By a proper thermal treatment, the nitrogen atoms can enter the R2Fe17 structure. The crystallographic and intrinsic magnetic properties as well as their relationship have been studied by magnetic measurements, X-ray and neutron diffraction techniques. The neutron data indicate that the nitrogen atoms occupy the interstitial sites in the Th2Zn17-type rhom-bohedral structure. The inserting nitrogen atoms are found to dilate the cell volume, increase the Curie temperature and enhance the saturation moment by raising the difference in the electron number between the spin-up and spin-down 3d subbands of the Fe atoms. Furthermore, the nitrogen atoms have an important effect on the magnetocrystallic anisotropy, which results in an easy axis with Sm2Fe17N2.4. All these make Sm2Fe17N2.4 favorable for permanent magnet applications. |
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| Keywords: | nitrogen Curie temperature magnetocrystalline anisotropy permanent magnet |
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