过渡金属掺杂ErMnO3的合成与磁性能研究

摘要钙钛矿结构稀土锰氧化物 AMnO3（A代表稀土）是一类重要的多功能材料，具有铁磁、磁光等优良性质，特别是它表现出非常大的磁电阻效应等丰富的物理内涵，是当今物理学家和材料科学家十分感兴趣的研究领域。ErMnO3 作为一种典型的751方结构锰氧化物，被证明具有铁电反铁磁性的多铁性材料。本实验通过优化工艺，采用溶胶-凝胶自蔓延燃烧法制备了一系列正交钙钛矿结构的Fe掺杂ErMnO3粉体。结合 XRD、 TEM、 VSM 等手段，详细分析了 Fe掺杂对于 ErMnO3的结构、形貌和磁性能的影响规律。当 CA/MN=1 和CA/MN=1.5 时，热处理温度均是达到1000℃，才可以得到纯相的 ErMnO3。采用相同的工艺条件，制备了一系列 Fe掺杂制备ErMn1-xFexO3（x=0.1,0.2,0.3）.当 x=0.1 时，在800℃，900℃热处理，得到的样品中除了ErMnO3主晶相外,还存在有Er2O3，Fe2O3杂相，当热处理温度达到1000℃时，得到接近纯相的样品；而当x=0.2，0.3时，当热处理温度高达 1000℃时，Er2O3，Fe2O3杂相仍然存在。在室温下，ErMnO3的 M-H 曲线都是完整的线性直线，它的磁化率随着磁场强度的增加而成线性增长，表现出典型顺磁性。在x= 0.1 的掺杂情况下，对该体系磁性的调控作用不明显。 35871
毕业论文键词：钙钛矿型化合物；ErMnO3；磁性能；溶胶凝胶法；掺杂
Transition Metal Doped ErMnO3 Synthesis and Studies of Magnetism
Abstract：AMnO3 perovskite compounds on behalf of rare earth (A=rare earth) is a kind of important material, has a ferromagnetic, magnetic fine properties such as light, and the rare earth is one kind of manganese oxide has many special properties and broad prospects for using the compounds.In this experiment,we use the commonly used sol-gel method in laboratory - ErMnO3,and try to explore its magnetism performance, and analyzes its feasibility in practical use and evaluation.    This experiment by optimizing process,prepared by sol-gel self-propagating combustion method a series of orthogonal Fe doped ErMnO3 powder of perovskite structure. Combined with XRD,TEM,VSM,detailed analysis of the Fe doping for ErMnO3 the influence law of the structure, morphology and magnetic. When the CA/MN = 1 and CA/MN = 1.5, heat treatment temperature is 1000℃, can get pure phase ErMnO3. Using the same process conditions, the preparation of a series of Fe doped preparation ErMn1 - xFexO3 (x = 0.1, 0.2, 0.3). When x = 0.1 at 800℃, 900℃ heat treatment, the samples besides ErMnO3 main crystal phase, there exist Er2O3, Fe2O3 mixed phase, when the heat treatment temperature of 1000 ℃, get closer to the pure phase of samples.And when the x = 0.2, 0.3, when the heat treatment temperature up to 1000℃, Er2O3, Fe2O3 mixed phase still exist. At room temperature, ErMnO3 M-H curve is a complete linear straight line, it increased with the increase of the intensity of magnetic field of magnetic susceptibility to linear growth, show the typical paramagnetism. Under the condition of doping of x = 0.1, the system of magnetic control effect is not obvious.
Keywords：Capacitance Perovskite oxide;ErMnO3; Magnetism;Sol-gel method;Dope

目录
1 文献综述 .. 2
1.1 前言   2
1.2 稀土锰氧化物简介   2
1.2.1 稀土锰氧化物的结构 . 2
1.2.2 稀土锰氧化物以及 ErMnO3的磁学特性   4
1.3 ErMnO3的结构 . 7
1.4 ErMnO3的制备 . 7
1.4.1 溶胶凝胶法制备 ErMnO3粉体 . 7
1.4.2 加压浮区法制备 ErMnO3单晶 . 8
1.4.3 水热法制备ErMnO3粉体 . 10
1.5 课题研究的目的和意义 .. 11
2 实验过程   12
2.1 溶胶凝胶法介绍 .. 12
2.1.1 基本原理 . 12
2.1.2 实验反应的原理以及原料配比计算 .. 13
2.1.3 实验所需药品 .. 13 过渡金属掺杂ErMnO3的合成与磁性能研究:http://www.751com.cn/cailiao/lunwen_34050.html