國立高雄大學圖資館 |

語系: 繁體中文

說明(常見問題)

圖資館首頁

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

摻雜鋱錳氧化物之磁性與介電性質研究 = Study of magneti...

國立高雄大學應用物理學系碩士班

摻雜鋱錳氧化物之磁性與介電性質研究 = Study of magnetic and dielectric properties of doped TbMnO3

紀錄類型:	書目-語言資料,印刷品 : 單行本
並列題名:	Study of magnetic and dielectric properties of doped TbMnO3
作者:	許旭均,
其他團體作者:	國立高雄大學
出版地:	[高雄市]
出版者:	國立高雄大學;
出版年:	2015[民104]
面頁冊數:	[10]，72面圖，表 : 30公分;
標題:	鋱錳氧化物
標題:	TbMnO3
電子資源:	https://hdl.handle.net/11296/4cyd2u
附註:	109年11月18日公開
摘要註:	本研究利用固態反應法(solid-state reaction method)製備Tb1-xYxMnO3 (0.0 ≤ x ≤ 0.15)與Tb1-xHoxMnO3 (0.0 ≤ x ≤ 0.15)兩系列之鋱錳氧化物塊材樣品，並量測其微觀結構、磁性質與介電性質，希望藉此能清楚探討釔和鈥摻雜對鋱錳氧化物物理性質之影響。樣品之微觀結構是以X-ray繞射分析儀(X-ray diffraction; XRD)進行分析。而樣品之磁性質則利用超導量子干涉儀(Superconducting Quantum Interference Device Magnetometer; SQUID)來測量。我們還以電容/電感/電阻表(LCR meter)來測量樣品的介電性質。從XRD之結果得知，Tb1-xYxMnO3 (0.0 ≤ x ≤ 0.15) 塊材樣品皆為單一相的正交鈣鈦礦結構，且隨著釔含量增加，樣品的晶格常數亦隨之減少。由磁性質分析發現，Tb1-xYxMnO3 (x = 0.0及x = 0.15) 樣品隨著Y的摻雜，樣品的磁化量會減少。另外，我們發現Tb3+磁矩翻轉所需要的外加磁場，則由於Y的摻雜而從16 kOe (x = 0)降為15 kOe (x = 0.15)。在介電特性分析發現，Tb1-xYxMnO3 (0.0 ≤ x ≤ 0.15) 樣品皆具有一個介電鬆弛峰，我們利用阿瑞尼士方程式擬合可得各樣品的活化能約為0.24 ~ 0.27 eV。我們推論樣品的介電鬆弛行為主要來自於晶界的IBLC效應。此外，從XRD之結果也發現，Tb1-xHoxMnO3 (0.0 ≤ x ≤ 0.15) 塊材樣品皆為單一相的正交鈣鈦礦結構，且隨著Ho含量增加，樣品的晶格常數也隨之減少。由磁性質分析顯示，Tb1-xHoxMnO3 (0.0 ≤ x ≤ 0.15) 樣品隨著Ho摻雜濃度漸增，樣品的磁化量也會隨之增加。同時，我們發現Tb1-xHoxMnO3 (0.0 ≤ x ≤ 0.15)樣品也具有介電鬆弛之現象，而且Tb0.85Ho0.15MnO3 樣品具有較高的介電常數(~14000)以及較低的介電損耗。 In this study, we prepared two series of Tb1-xYxMnO3 (0.0 ≤ x ≤ 0.15) and Tb1-xHoxMnO3 (0.0 ≤ x ≤ 0.15) bulk samples by solid-state reaction method. Owing to study the magnetic and dielectric properties of Yttrium (Y) or Holmium (Ho) doped TbMnO3 samples; we measured their microstructure, magnetic and electrical properties. The crystalline structures of samples were examined by X-ray diffraction (XRD). The magnetization measurements were carried out using the Superconducting Quantum Interference Device (SQUID) magnetometer. The dielectric properties measurements were performed using a LCR meter. From the results of XRD patterns of the Tb1-xYxMnO3 (0.0 ≤ x ≤ 0.15) samples, all the observed peaks can be indexed in orthorhombic perovskite structures. Lattice parameters a and c change systematically with increasing Y content (x) implies that the Y-ions do replace the Tb-ions. The magnetization M(H) of Tb1-xYxMnO3 (0.0 ≤ x ≤ 0.15) samples, showing the magnetization decreases with increasing the Y-content. The magnetic characterization indicates that with increasing Y-content, up to 0.15, the metamagnetic transition field of Tb3+ decreased from 16 kOe to 15 kOe. The dielectric spectrum of the Tb1-xYxMnO3 (0.0 ≤ x ≤ 0.15) samples, showing a dielectric loss peak which follows the Arrhenius behavior that gives the activation energy between 0.24 ~ 0.27 eV, close to the IBLC effects associated with the grain boundaries. Furthermore, the sample of Tb0.95Y0.05MnO3 presents the largest dielectric constants at low frequency. We also observed all Tb1-xHoxMnO3 (0.0 ≤ x ≤ 0.15) samples with orthorhombic perovskite structures. The substitution of Tb3+ by Ho3+ leads to lattice contraction due to the smaller ionic radius of Ho3+ than Tb3+. The magnetic characterization indicates that with an increase in the Ho-content, the magnetization of Tb1-xHoxMnO3 (0.0 ≤ x ≤ 0.15) increases. Moreover, the dielectric spectrum was also obtained, the Ho-doped TbMnO3 samples exhibit the only one relaxation behavior that associated with the IBLC effects related to the grain boundaries. Furthermore, the sample of Tb0.85Ho0.15MnO3 presents the largest dielectric constants (~14000) and lowest dielectric loss at low frequency.

摻雜鋱錳氧化物之磁性與介電性質研究 = Study of magnetic and dielectric properties of doped TbMnO3
許, 旭均

摻雜鋱錳氧化物之磁性與介電性質研究 = Study of magnetic and dielectric properties of doped TbMnO3 / 許旭均撰 - [高雄市] : 國立高雄大學, 2015[民104]. - [10]，72面 ; 圖，表 ; 30公分.
109年11月18日公開.
參考書目：葉59-61.
鋱錳氧化物TbMnO3

摻雜鋱錳氧化物之磁性與介電性質研究 = Study of magnetic and dielectric properties of doped TbMnO3
LDR:05113nam0a2200277 450 001 458468
005 20220310133915.0
010 0 $b 精裝
010 0 $b 平裝
100 $a 20151007d2015 k y0chiy50 b
101 0 $a eng $d chi $d eng
102 $a tw
105 $a ak am 000yy
200 1 $a 摻雜鋱錳氧化物之磁性與介電性質研究 $d Study of magnetic and dielectric properties of doped TbMnO3 $z eng $f 許旭均撰
210 $a [高雄市] $c 國立高雄大學 $d 2015[民104]
215 0 $a [10]，72面 $c 圖，表 $d 30公分
300 $a 109年11月18日公開
314 $a 指導教授：韓岱君博士
320 $a 參考書目：葉59-61
328 $a 碩士論文--國立高雄大學應用物理學系碩士班
330 $a 本研究利用固態反應法(solid-state reaction method)製備Tb1-xYxMnO3 (0.0 ≤ x ≤ 0.15)與Tb1-xHoxMnO3 (0.0 ≤ x ≤ 0.15)兩系列之鋱錳氧化物塊材樣品，並量測其微觀結構、磁性質與介電性質，希望藉此能清楚探討釔和鈥摻雜對鋱錳氧化物物理性質之影響。樣品之微觀結構是以X-ray繞射分析儀(X-ray diffraction; XRD)進行分析。而樣品之磁性質則利用超導量子干涉儀(Superconducting Quantum Interference Device Magnetometer; SQUID)來測量。我們還以電容/電感/電阻表(LCR meter)來測量樣品的介電性質。從XRD之結果得知，Tb1-xYxMnO3 (0.0 ≤ x ≤ 0.15) 塊材樣品皆為單一相的正交鈣鈦礦結構，且隨著釔含量增加，樣品的晶格常數亦隨之減少。由磁性質分析發現，Tb1-xYxMnO3 (x = 0.0及x = 0.15) 樣品隨著Y的摻雜，樣品的磁化量會減少。另外，我們發現Tb3+磁矩翻轉所需要的外加磁場，則由於Y的摻雜而從16 kOe (x = 0)降為15 kOe (x = 0.15)。在介電特性分析發現，Tb1-xYxMnO3 (0.0 ≤ x ≤ 0.15) 樣品皆具有一個介電鬆弛峰，我們利用阿瑞尼士方程式擬合可得各樣品的活化能約為0.24 ~ 0.27 eV。我們推論樣品的介電鬆弛行為主要來自於晶界的IBLC效應。此外，從XRD之結果也發現，Tb1-xHoxMnO3 (0.0 ≤ x ≤ 0.15) 塊材樣品皆為單一相的正交鈣鈦礦結構，且隨著Ho含量增加，樣品的晶格常數也隨之減少。由磁性質分析顯示，Tb1-xHoxMnO3 (0.0 ≤ x ≤ 0.15) 樣品隨著Ho摻雜濃度漸增，樣品的磁化量也會隨之增加。同時，我們發現Tb1-xHoxMnO3 (0.0 ≤ x ≤ 0.15)樣品也具有介電鬆弛之現象，而且Tb0.85Ho0.15MnO3 樣品具有較高的介電常數(~14000)以及較低的介電損耗。 In this study, we prepared two series of Tb1-xYxMnO3 (0.0 ≤ x ≤ 0.15) and Tb1-xHoxMnO3 (0.0 ≤ x ≤ 0.15) bulk samples by solid-state reaction method. Owing to study the magnetic and dielectric properties of Yttrium (Y) or Holmium (Ho) doped TbMnO3 samples; we measured their microstructure, magnetic and electrical properties. The crystalline structures of samples were examined by X-ray diffraction (XRD). The magnetization measurements were carried out using the Superconducting Quantum Interference Device (SQUID) magnetometer. The dielectric properties measurements were performed using a LCR meter. From the results of XRD patterns of the Tb1-xYxMnO3 (0.0 ≤ x ≤ 0.15) samples, all the observed peaks can be indexed in orthorhombic perovskite structures. Lattice parameters a and c change systematically with increasing Y content (x) implies that the Y-ions do replace the Tb-ions. The magnetization M(H) of Tb1-xYxMnO3 (0.0 ≤ x ≤ 0.15) samples, showing the magnetization decreases with increasing the Y-content. The magnetic characterization indicates that with increasing Y-content, up to 0.15, the metamagnetic transition field of Tb3+ decreased from 16 kOe to 15 kOe. The dielectric spectrum of the Tb1-xYxMnO3 (0.0 ≤ x ≤ 0.15) samples, showing a dielectric loss peak which follows the Arrhenius behavior that gives the activation energy between 0.24 ~ 0.27 eV, close to the IBLC effects associated with the grain boundaries. Furthermore, the sample of Tb0.95Y0.05MnO3 presents the largest dielectric constants at low frequency. We also observed all Tb1-xHoxMnO3 (0.0 ≤ x ≤ 0.15) samples with orthorhombic perovskite structures. The substitution of Tb3+ by Ho3+ leads to lattice contraction due to the smaller ionic radius of Ho3+ than Tb3+. The magnetic characterization indicates that with an increase in the Ho-content, the magnetization of Tb1-xHoxMnO3 (0.0 ≤ x ≤ 0.15) increases. Moreover, the dielectric spectrum was also obtained, the Ho-doped TbMnO3 samples exhibit the only one relaxation behavior that associated with the IBLC effects related to the grain boundaries. Furthermore, the sample of Tb0.85Ho0.15MnO3 presents the largest dielectric constants (~14000) and lowest dielectric loss at low frequency.
510 1 $a Study of magnetic and dielectric properties of doped TbMnO3 $z eng
610 # 0 $a 鋱錳氧化物 $a 磁化量 $a 介電鬆弛
610 # 1 $a TbMnO3 $a magnetization $a dielectric relaxation
681 $a 008M/0019 $b 423203 0844 $v 2007年版
700 1 $a 許 $b 旭均 $4 撰 $3 709706
712 0 2 $a 國立高雄大學 $b 應用物理學系碩士班 $3 353956
801 0 $a tw $b NUK $c 20201110 $g CCR
856 7 # $u https://hdl.handle.net/11296/4cyd2u $z 電子資源 $2 http