Synthesis and Characterization of Chemical – Substituted TbMnO3 Magnetic Oxide
碩士 === 中國文化大學 === 材料科學與製造研究所 === 93 === (Tb1-xNax)MnO3 (0 ≦ x ≦ 0.3) and (Tb1-xEux)MnO3 (0 ≦ x ≦ 1.0) perovskites have been prepared by solid–state method and their crystal structure, magnetic and transport properties were investigated. These compounds were found to be of orthorhombic crystal struct...
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ndltd-TW-093PCCU01590102015-10-13T15:29:21Z http://ndltd.ncl.edu.tw/handle/03061111377837001277 Synthesis and Characterization of Chemical – Substituted TbMnO3 Magnetic Oxide 化學摻雜之TbMnO3磁性氧化物合成與特性分析 Yi-Hao Lien 連俋豪 碩士 中國文化大學 材料科學與製造研究所 93 (Tb1-xNax)MnO3 (0 ≦ x ≦ 0.3) and (Tb1-xEux)MnO3 (0 ≦ x ≦ 1.0) perovskites have been prepared by solid–state method and their crystal structure, magnetic and transport properties were investigated. These compounds were found to be of orthorhombic crystal structure with a space group Pbnm. The chemical pressure will increase with the substitution of Tb3+ by Na+ where as it is constant when Tb3+ substituted by Eu3+. We found that oxygen content will decrease when Na+ content increases due to the charge balance necessary for the compounds. On the other hand, doping of non – magnetic Na+ and Eu3+ into TbMnO3 exhibit spin glass state. The long range AF ordering has been frustrated to short range AF and FM ordering, so that there are two magnetic properties (AF and FM) observed in all compounds. Moreover, the resistivity is decreased with increasing Na+ and Eu3+ content. Chao-Yuan Huang 黃昭淵 2005 學位論文 ; thesis 107 zh-TW |
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碩士 === 中國文化大學 === 材料科學與製造研究所 === 93 === (Tb1-xNax)MnO3 (0 ≦ x ≦ 0.3) and (Tb1-xEux)MnO3 (0 ≦ x ≦ 1.0) perovskites have been prepared by solid–state method and their crystal structure, magnetic and transport properties were investigated. These compounds were found to be of orthorhombic crystal structure with a space group Pbnm. The chemical pressure will increase with the substitution of Tb3+ by Na+ where as it is constant when Tb3+ substituted by Eu3+. We found that oxygen content will decrease when Na+ content increases due to the charge balance necessary for the compounds.
On the other hand, doping of non – magnetic Na+ and Eu3+ into TbMnO3 exhibit spin glass state. The long range AF ordering has been frustrated to short range AF and FM ordering, so that there are two magnetic properties (AF and FM) observed in all compounds. Moreover, the resistivity is decreased with increasing Na+ and Eu3+ content.
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author2 |
Chao-Yuan Huang |
author_facet |
Chao-Yuan Huang Yi-Hao Lien 連俋豪 |
author |
Yi-Hao Lien 連俋豪 |
spellingShingle |
Yi-Hao Lien 連俋豪 Synthesis and Characterization of Chemical – Substituted TbMnO3 Magnetic Oxide |
author_sort |
Yi-Hao Lien |
title |
Synthesis and Characterization of Chemical – Substituted TbMnO3 Magnetic Oxide |
title_short |
Synthesis and Characterization of Chemical – Substituted TbMnO3 Magnetic Oxide |
title_full |
Synthesis and Characterization of Chemical – Substituted TbMnO3 Magnetic Oxide |
title_fullStr |
Synthesis and Characterization of Chemical – Substituted TbMnO3 Magnetic Oxide |
title_full_unstemmed |
Synthesis and Characterization of Chemical – Substituted TbMnO3 Magnetic Oxide |
title_sort |
synthesis and characterization of chemical – substituted tbmno3 magnetic oxide |
publishDate |
2005 |
url |
http://ndltd.ncl.edu.tw/handle/03061111377837001277 |
work_keys_str_mv |
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