Phase Transformation Study of NiMn in NiFe/NiMn system
碩士 === 國立清華大學 === 材料科學工程學系 === 88 === NiMn has been shown to be a promising candidate as an AF material of spin valves. But as-deposited NiMn films are of fcc paramagnetic phase typically, post-annealing is required to attain fct antiferromagnetical phase. The previous research of NiMn ma...
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ndltd-TW-088NTHU01590792016-07-08T04:23:16Z http://ndltd.ncl.edu.tw/handle/74813172238214835419 Phase Transformation Study of NiMn in NiFe/NiMn system NiFe/NiMn系統中NiMn相轉變與交換場變化之研究 Wei-Chih Lien 連偉智 碩士 國立清華大學 材料科學工程學系 88 NiMn has been shown to be a promising candidate as an AF material of spin valves. But as-deposited NiMn films are of fcc paramagnetic phase typically, post-annealing is required to attain fct antiferromagnetical phase. The previous research of NiMn mainly focus on parameters tunning to get high exchange field. The correlation of magnetic properties with phase transformation ratio of NiMn is seldom investigated. Now we study phase transformation of NiMn with TEM. From TEM diffraction pattern, we can distinguish the disordered fcc phase from ordered fct phase of NiMn. Dark field image contributed by (110) pattern only shown in order phase, can be used to calculate the order volume fraction of NiMn. We have applied DF TEM and accumulated sum to investigate ordering volume fraction and ordering parameter. Chih-Huang Lai Fu-Rong Chen 賴志煌 陳福榮 2000 學位論文 ; thesis 87 zh-TW |
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碩士 === 國立清華大學 === 材料科學工程學系 === 88 === NiMn has been shown to be a promising candidate as an AF material of spin valves. But as-deposited NiMn films are of fcc paramagnetic phase typically, post-annealing is required to attain fct antiferromagnetical phase. The previous research of NiMn mainly focus on parameters tunning to get high exchange field. The correlation of magnetic properties with phase transformation ratio of NiMn is seldom investigated. Now we study phase transformation of NiMn with TEM. From TEM diffraction pattern, we can distinguish the disordered fcc phase from ordered fct phase of NiMn. Dark field image contributed by (110) pattern only shown in order phase, can be used to calculate the order volume fraction of NiMn. We have applied DF TEM and accumulated sum to investigate ordering volume fraction and ordering parameter.
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author2 |
Chih-Huang Lai |
author_facet |
Chih-Huang Lai Wei-Chih Lien 連偉智 |
author |
Wei-Chih Lien 連偉智 |
spellingShingle |
Wei-Chih Lien 連偉智 Phase Transformation Study of NiMn in NiFe/NiMn system |
author_sort |
Wei-Chih Lien |
title |
Phase Transformation Study of NiMn in NiFe/NiMn system |
title_short |
Phase Transformation Study of NiMn in NiFe/NiMn system |
title_full |
Phase Transformation Study of NiMn in NiFe/NiMn system |
title_fullStr |
Phase Transformation Study of NiMn in NiFe/NiMn system |
title_full_unstemmed |
Phase Transformation Study of NiMn in NiFe/NiMn system |
title_sort |
phase transformation study of nimn in nife/nimn system |
publishDate |
2000 |
url |
http://ndltd.ncl.edu.tw/handle/74813172238214835419 |
work_keys_str_mv |
AT weichihlien phasetransformationstudyofnimninnifenimnsystem AT liánwěizhì phasetransformationstudyofnimninnifenimnsystem AT weichihlien nifenimnxìtǒngzhōngnimnxiāngzhuǎnbiànyǔjiāohuànchǎngbiànhuàzhīyánjiū AT liánwěizhì nifenimnxìtǒngzhōngnimnxiāngzhuǎnbiànyǔjiāohuànchǎngbiànhuàzhīyánjiū |
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