中国物理B ›› 2019, Vol. 28 ›› Issue (3): 37701-037701.doi: 10.1088/1674-1056/28/3/037701

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Structures and local ferroelectric polarization switching properties of orthorhombic YFeO3 thin film prepared by a sol-gel method

Runlan Zhang(张润兰), Shuaishuai Li(李帅帅), Changle Chen(陈长乐), Li-An Han(韩立安), Shanxin Xiong(熊善新)   

  1. 1 College of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China;
    2 Shaanxi Key Laboratory of Condensed Matter Structures and Properties, Northwestern Polytechnical University, Xi'an 710072, China;
    3 College of Science, Xi'an University of Science and Technology, Xi'an 710054, China
  • 收稿日期:2018-09-12 修回日期:2018-11-26 出版日期:2019-03-05 发布日期:2019-03-05
  • 通讯作者: Runlan Zhang E-mail:zrlan_69@163.com
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant No. 61471301), Natural Science Basic Research Program of Shaanxi, China (Grant No. 2017JQ5083), and PhD Research Startup Foundation of Xi'an University of Science and Technology, China (Grant No. 2017QDJ044).

Structures and local ferroelectric polarization switching properties of orthorhombic YFeO3 thin film prepared by a sol-gel method

Runlan Zhang(张润兰)1, Shuaishuai Li(李帅帅)1, Changle Chen(陈长乐)2, Li-An Han(韩立安)3, Shanxin Xiong(熊善新)1   

  1. 1 College of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China;
    2 Shaanxi Key Laboratory of Condensed Matter Structures and Properties, Northwestern Polytechnical University, Xi'an 710072, China;
    3 College of Science, Xi'an University of Science and Technology, Xi'an 710054, China
  • Received:2018-09-12 Revised:2018-11-26 Online:2019-03-05 Published:2019-03-05
  • Contact: Runlan Zhang E-mail:zrlan_69@163.com
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant No. 61471301), Natural Science Basic Research Program of Shaanxi, China (Grant No. 2017JQ5083), and PhD Research Startup Foundation of Xi'an University of Science and Technology, China (Grant No. 2017QDJ044).

摘要:

Orthorhombic YFeO3 thin film was prepared on La0.67Sr0.33MnO3/LaAlO3 substrate by a sol-gel spin-coating method. The structures of the YFeO3/La0.67Sr0.33MnO3/LaAlO3 (YFO/LSMO/LAO) sample were detected by x-ray diffraction pattern, Raman spectrometer, scanning electron microscopy, and atomic force microscope. The local ferroelectric polarization switching properties of the orthorhombic YFO film were confirmed by piezoresponse force microscopy (PFM) for the first time. The results show that the YFO film deposited on LSMO/LAO possesses orthorhombic structure, with ultra-fine crystal grains and flat surface. The leakage current of the YFO film is 8.39×10-4 A·cm-2 at 2 V, with its leakage mechanism found to be an ohmic behavior. PFM measurements indicate that the YFO film reveals weak ferroelectricity at room temperature and the local switching behavior of ferroelectric domains has been identified. By local poling experiment, polarization reversal in the orthorhombic YFO film at room temperature was further observed.

关键词: multiferroics, YFeO3 thin film, orthorhombic structure, piezoresponse force microscopy

Abstract:

Orthorhombic YFeO3 thin film was prepared on La0.67Sr0.33MnO3/LaAlO3 substrate by a sol-gel spin-coating method. The structures of the YFeO3/La0.67Sr0.33MnO3/LaAlO3 (YFO/LSMO/LAO) sample were detected by x-ray diffraction pattern, Raman spectrometer, scanning electron microscopy, and atomic force microscope. The local ferroelectric polarization switching properties of the orthorhombic YFO film were confirmed by piezoresponse force microscopy (PFM) for the first time. The results show that the YFO film deposited on LSMO/LAO possesses orthorhombic structure, with ultra-fine crystal grains and flat surface. The leakage current of the YFO film is 8.39×10-4 A·cm-2 at 2 V, with its leakage mechanism found to be an ohmic behavior. PFM measurements indicate that the YFO film reveals weak ferroelectricity at room temperature and the local switching behavior of ferroelectric domains has been identified. By local poling experiment, polarization reversal in the orthorhombic YFO film at room temperature was further observed.

Key words: multiferroics, YFeO3 thin film, orthorhombic structure, piezoresponse force microscopy

中图分类号:  (Multiferroic/magnetoelectric films)

  • 77.55.Nv
77.84.-s (Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials) 68.37.Ps (Atomic force microscopy (AFM))