Crystalline Structure, Mixed Valence States, and Magnetic Behavior in Single Crystalline Fe-Ni-O Thin Films
碩士 === 國立中正大學 === 物理系 === 92 === In order to understand the structural transformation of the Fe - Ni - O mixture film formations, we use (MBE) molecular beam epitaxy to generate a series of Fe Ni O on MgO(001) substrate. During it’s developing process, we maintain its temperature at 250 0C and film...
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ndltd-TW-092CCU001980242015-10-13T13:39:29Z http://ndltd.ncl.edu.tw/handle/22201701488253251244 Crystalline Structure, Mixed Valence States, and Magnetic Behavior in Single Crystalline Fe-Ni-O Thin Films 單晶Fe-Ni-O薄膜的晶體結構,混合價態與磁性行為 WenLih Pan 潘文立 碩士 國立中正大學 物理系 92 In order to understand the structural transformation of the Fe - Ni - O mixture film formations, we use (MBE) molecular beam epitaxy to generate a series of Fe Ni O on MgO(001) substrate. During it’s developing process, we maintain its temperature at 250 0C and film in 1000 thickness. Regarding the film measurement, we use the x-ray diffraction instrument to measure the film’s crystal lattice constant transformation. We also use x-ray absorption spectroscopy to measure film’s electronic structure,and VSM to measure the film’s magnetic. Our laboratorial measurement research shows that mixture film Fe Ni O when X=0~0.71, its magnetic and oxide electric structure, is quite similar to Fe O ; both are spinel structure. However, when X=0.8~1,the film’s magnetic disappears and it’s oxide electric structures is also quite similar to NiO; both are rocksalt structure. Therefore, we would like to suppose that when X=0.71~0.8, the film’s structure transformed. Also, we may conclude the following assumption: the stability of crystal structure is related to the structure’s ion mixture valence and ion’s radius. Gung Chern 陳 恭 2004 學位論文 ; thesis 0 zh-TW |
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碩士 === 國立中正大學 === 物理系 === 92 === In order to understand the structural transformation of the Fe - Ni - O mixture film formations, we use (MBE) molecular beam epitaxy to generate a series of Fe Ni O on MgO(001) substrate. During it’s developing process, we maintain its temperature at 250 0C and film in 1000 thickness. Regarding the film measurement, we use the x-ray diffraction instrument to measure the film’s crystal lattice constant transformation. We also use x-ray absorption spectroscopy to measure film’s electronic structure,and VSM to measure the film’s magnetic. Our laboratorial measurement research shows that mixture film Fe Ni O when X=0~0.71, its magnetic and oxide electric structure, is quite similar to Fe O ; both are spinel structure. However, when X=0.8~1,the film’s magnetic disappears and it’s oxide electric structures is also quite similar to NiO; both are rocksalt structure. Therefore, we would like to suppose that when X=0.71~0.8, the film’s structure transformed. Also, we may conclude the following assumption: the stability of crystal structure is related to the structure’s ion mixture valence and ion’s radius.
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author2 |
Gung Chern |
author_facet |
Gung Chern WenLih Pan 潘文立 |
author |
WenLih Pan 潘文立 |
spellingShingle |
WenLih Pan 潘文立 Crystalline Structure, Mixed Valence States, and Magnetic Behavior in Single Crystalline Fe-Ni-O Thin Films |
author_sort |
WenLih Pan |
title |
Crystalline Structure, Mixed Valence States, and Magnetic Behavior in Single Crystalline Fe-Ni-O Thin Films |
title_short |
Crystalline Structure, Mixed Valence States, and Magnetic Behavior in Single Crystalline Fe-Ni-O Thin Films |
title_full |
Crystalline Structure, Mixed Valence States, and Magnetic Behavior in Single Crystalline Fe-Ni-O Thin Films |
title_fullStr |
Crystalline Structure, Mixed Valence States, and Magnetic Behavior in Single Crystalline Fe-Ni-O Thin Films |
title_full_unstemmed |
Crystalline Structure, Mixed Valence States, and Magnetic Behavior in Single Crystalline Fe-Ni-O Thin Films |
title_sort |
crystalline structure, mixed valence states, and magnetic behavior in single crystalline fe-ni-o thin films |
publishDate |
2004 |
url |
http://ndltd.ncl.edu.tw/handle/22201701488253251244 |
work_keys_str_mv |
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1717739752552136704 |