Twin-microstructure enhanced magnetoresistance in La_(0.67)Ba_(0.33)MnO_3 oxides

Y. B. Zhang; S. Li; C.Q. Sun; T. Sritharan

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Twin-microstructure enhanced magnetoresistance in La_(0.67)Ba_(0.33)MnO_3 oxides

机译：La_（0.67）Ba_（0.33）MnO_3氧化物中的双微结构增强的磁阻

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The grain growth dependence of microstructure and its effects on magnetic and transport properties are studied in the polycrystalline La_(0.67)Ba_(0.33)MnO_3 oxides. It is found that a lateral growth manner along a certain direction and a concentric terrace pattern along three orthogonal axes occur in the samples sintered at 1573 and 1673 K, respectively. Lamella-like twin microstructure forms in the concentric terrace growth pattern and the magnetoresistance properties can be enhanced by the twin microstructure. It suggests that the twin-boundaries in twin-grains may possibly induce spin-dependent scattering of electrons that is field reduced, or spin-polarized tunneling of electrons that is field enhanced, thus strengthening the effect of grain boundaries.

机译：研究了多晶La_（0.67）Ba_（0.33）MnO_3氧化物的微观结构对晶粒生长的依赖性及其对磁性和输运性能的影响。结果发现，分别在1573 K和1673 K下烧结的样品沿一定方向有横向生长方式，沿三个正交轴有同心阶状分布。薄片状孪晶微观结构形成在同心阶地生长模式中，并且孪晶微观结构可以增强磁阻特性。这表明，双晶中的双边界可能会引起场减小的电子的自旋依赖性散射，或者场增强的电子的自旋极化隧穿，从而增强了晶界的作用。

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来源
《Solid State Communications》 |2006年第10期|p.506-510|共5页
作者
Y. B. Zhang; S. Li; C.Q. Sun; T. Sritharan;
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作者单位

School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore;

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原文格式 PDF
正文语种 eng
中图分类固体物理学;
关键词
C. Grain boundaries; D. Electronic transport;

机译：C.晶界;D.电子运输;

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1. Modeling of colossal magnetoresistance in La_(0.67)Ca_(0.33)MnO_3/Pr_(0.67)Ca_(0.33)MnO_3 superlattices: Comparison with individual (La_(1-y)Pr_y)_(0.67)Ca_(0.33)MnO_3 films [J] . S. Huehn, M. Jungbauer, M. Michelmann, Journal of Applied Physics . 2013,第17pta2期

机译：La_（0.67）Ca_（0.33）MnO_3 / Pr_（0.67）Ca_（0.33）MnO_3超晶格中的巨磁电阻模型：与单个（La_（1-y）Pr_y）_（0.67）Ca_（0.33）MnO_3膜的比较
2. Preparation and colossal magnetoresistance in a trilayer La_(0.67)Sr_(0.33)MnO_3/La_(0.75)MnO_3/La_(0.67)Sr_(0.33)MnO_3 device by dc magnetron sputtering [J] . H.Q. Li, Q.F. Fang, Z.G. Zhu Materials Research Bulletin . 2002,第5期

机译：直流磁控溅射在三层La_（0.67）Sr_（0.33）MnO_3 / La_（0.75）MnO_3 / La_（0.67）Sr_（0.33）MnO_3器件中的制备和巨大磁阻
3. Giant enhancement of room-temperature magnetoresistance in La_(0.67)Sr_(0.33)MnO_3/Nd_(0.67)Sr_(0.33)MnO_3 multilayers [J] . Soumik Mukhopadhyay, I. Das Applied Physics Letters . 2006,第3期

机译：La_（0.67）Sr_（0.33）MnO_3 / Nd_（0.67）Sr_（0.33）MnO_3多层中室温磁阻的极大增强
4. Effect of Various Sintering Temperature on Resistivity Behaviour and Magnetoresistance of La_(0.67)Ba_(0.33)MnO_3 [C] . R. Pratama, B. Kurniawan, A. Manaf, International Symposium on Current Progress in Mathematics and Sciences . 2016

机译：各种烧结温度对La_（0.67）Ba_（0.33）MnO_3的电阻率行为和磁阻的影响
5. Self-Polarization Induced Magnetoelectric Coupling in Lanthanum Strontiummanganite (LA0.67SR0.33MNO3)AND Lead Zirconate Titanate (PBZR0.52TI0.48O3) Thin Film Heterostructures [D] . Xiaoqian, Yu. 2018

机译：镧锶锰（LA0.67SR0.33MNO3）和锆钛酸铅（PBZR0.52TI0.48O3）薄膜异质结构中的自极化感应磁电耦合
6. Enhancement of Low-field Magnetoresistance in Self-Assembled Epitaxial La0.67Ca0.33MnO3:NiO and La0.67Ca0.33MnO3:Co3O4 Composite Films via Polymer-Assisted Deposition [O] . Meng Zhou, Yuling Li, Il Jeon, -1

机译：通过聚合物辅助沉积增强自组装外延La0.67Ca0.33MnO3：NiO和La0.67Ca0.33MnO3：Co3O4复合膜中的低场磁阻
7. Giant enhancement of room temperature magnetoresistance in La_{0.67}Sr_{0.33}MnO_{3}/Nd_{0.67}Sr_{0.33}MnO_{3} multilayers [O] . Mukhopadhyay, Soumik, Das, I. 2006

机译：室温磁电阻的巨大增强 La {{0.67} sr_ {0.33} mnO_ {3} / Nd_ {0.67} sr_ {0.33} mnO_ {3}多层

Twin-microstructure enhanced magnetoresistance in La_(0.67)Ba_(0.33)MnO_3 oxides

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