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Transport and magnetoresistance effect in an oxygen-deficient SrTiO3/La0.67Sr0.33MnO3 heterojunction
  • ISSN号：1674-1056
  • 期刊名称：Chinese Physics B
  • 时间：2013.12.12
  • 页码：-
  • 分类：TN322.8[电子电信—物理电子学] TP212[自动化与计算机技术—控制科学与工程;自动化与计算机技术—检测技术与自动化装置]
  • 作者机构：[1]Shaanxi Key Laboratory of Condensed Matter Structures and Properties, School of Science, Northwestern Polytechnical University, Xi' an 710072, China, [2]College of Physics and Electronic Engineering, Weinan Normal University, Weinan 714000, China
  • 相关基金：Project supported by the National Natural Science Foundation of China （Grant Nos. 61078057, 51172183, and 51202195）, the Natural Science Foundation of Shaanxi Province, China （Grant No. 2012JQ8013）, the Aviation Foundation of China （Grant No. 2011ZF53065）, and the Foundation for Fundamental Research of Northwestern Polytechnical University （NPU）, China （Grant Nos. JC201155, JC201271, and JC20120246）.
  • 相关项目：氧化物超晶格磁阻挫多铁材料及其光响应研究
作者： Wang Jing|Chen Chang-Le|Yang Shi-Hai|
关键词： 磁阻效应, 异质结, 缺氧, 脉冲激光沉积法, 运输, 温度范围, 正向偏压, 传输机制, semiconductors multilayer structure electrical properties magnetoresistance
中文摘要：

An oxygen-deficient SrTiO3/La0.67Sr0.33MnO3 heterojunction is fabricated on an SrTiO3 (001) substrate by a pulsed laser deposition method. The electrical characteristics of the heterojunction are studied systematically in a temperature range from 80 K to 300 K. The transport mechanism follows I ∝ exp(eV /nkT) under small forward bias, while it becomes space charge limited and follows I ∝ Vm(T) with 1.49

英文摘要：

An oxygen-deficient SrTiO3/La0.67Sr0.33MnO3 heterojunction is fabricated on an SrTiO3 （001） substrate by a pulsed laser deposition method. The electrical characteristics of the heterojunction are studied systematically in a temperature range from 80 K to 300 K. The transport mechanism follows I ∝ exp （eV/nkT） under small forward bias, while it becomes space charge limited and follows I ∝ Vm（T） with 1.49〈 m 〈1.99 under high bias. Such a heterojunction also exhibits magnetoresistance （MR） effect. The absolute value of negative MR monotonically increases with temperature decreasing and reaches 26.7% at 80 K under H=0.7 T. Various factors, such as strain and oxygen deficiency play dominant roles in the characteristics.

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期刊信息
  • 《中国物理B：英文版》
  • 中国科技核心期刊
  • 主管单位:中国科学院
  • 主办单位:中国物理学会和中国科学院物理研究所
  • 主编：欧阳钟灿
  • 地址：北京 中关村 中国科学院物理研究所内
  • 邮编：100080
  • 邮箱：
  • 电话：010-82649026 82649519
  • 国际标准刊号：ISSN：1674-1056
  • 国内统一刊号：ISSN：11-5639/O4
  • 邮发代号:
  • 获奖情况:
  • 国内外数据库收录:
  • 被引量:406