Local Joule Heating Mimicking Electroresistance-Like Behavior in Antiperovskite Mn3GaC
Local Joule Heating Mimicking Electroresistance-Like Behavior in Antiperovskite Mn3GaC
复制标题
局部焦耳热模拟反钙钛矿 Mn3GaC 中的类电阻行为
DOI：
10.1002/aelm.201800028
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发表时间：
2018
影响因子：
6.2
通讯作者：
Christoph Sürgers
中科院分区：
文献类型：
--
作者：
Sihao Deng;Gerda Fischer;Sasmita Srich;an;Lielin Wang;Cong Wang;Christoph Sürgers
由于其在下一代非易失性存储技术中的潜在应用，电阻已成为一个激动人心的研究课题。本文报道了反钙钛矿结构的Mn3GaC化合物在反铁磁-中间相变附近的类电阻行为。高敏电流显著降低了高阻反铁磁相相对于低阻中间相的比例，表现出高达50%的电阻率变化。通过对不同样品位置的电阻率和外加电流下的磁化强度的广泛研究，明确地表明，这种类电阻行为源于样品的高阻铅接触引起的局部焦耳加热，而不是本征效应。这些发现为探索类电阻行为开辟了一条有效的途径，通过在局部焦耳加热的驱动力下实现高和低电阻相的相共存。
Electroresistance has become a stimulating research topic because of its potential applications in next‐generation nonvolatile memory technology. Here, an electroresistance‐like behavior of the antiperovskite Mn3GaC compound around the antiferromagnetic–intermediate phase transition is reported. A high sensing current significantly decreases the fraction of the antiferromagnetic phase of higher resistivity relative to the intermediate phase of lower resistivity upon warming, showing a resistivity change up to 50%. Through extensive studies of the resistivity at different sample locations and of the magnetization under applied current, it is unambiguously shown that this electroresistance‐like behavior originates from the local Joule heating of the sample due to high‐resistive lead contacts and not from an intrinsic effect. These findings open an available avenue to explore electroresistance‐like behavior by achieving phase coexistence of a high‐ and low‐resistivity phase under the driving force of local Joule heating.