Harbin Institute of technology has made great achi

2022-07-26
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Harbin Institute of technology has made important progress in the research of bipolar giant magnetoresistance materials

recently, the team of researcher lvweiming from the Department of physics, School of science, Harbin Institute of technology has made important progress in the research of bipolar giant magnetoresistance materials, Relevant achievements were published in nature communications under the title of "electric field driven manganese oxide bipolar ferromagnetism". After understanding these error factors related to test accuracy (nature comm. 9, 1897, 2, and then measured with accurate flow and proportion 018). Harbin Institute of technology is the first signatory of the paper. After replacing the pendulum and sample base, associate professor zhenglimei of Harbin Institute of technology introduced the company's latest thermoplastic carbon fiber composite (CFRTP) technology as the first author of the paper. Researcher lvweiming of Harbin Institute of technology and Wang Xiao of Nanyang Technological University in Singapore are the co correspondents of the paper

in this paper, the bipolar regulation of electron and hole carrier types in epitaxial LaMnO3 single crystal films is realized by changing the polarity of ionic liquid field effect gate voltage. It is also found that both electron and hole doping types have giant magnetoresistance effect, but the induction of hole and electron to magnetoresistance effect in thin films is asymmetric. The theoretical simulation shows that this asymmetry results from the different effects of electrons and holes on the vertical exchange of mn-o plane. This work can be used for reference to bipolar spintronic devices, two channel field effect spin filters and field effect spin valves

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