Magnetic behaviors of cerium oxide-based thin films deposited using electrochemical method

doi:10.1088/1674-1056/23/9/097503

›› 2014, Vol. 23 ›› Issue (9): 97503-097503.doi: 10.1088/1674-1056/23/9/097503

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

Magnetic behaviors of cerium oxide-based thin films deposited using electrochemical method

彭英姿^{a b}, 李源^{a b}, 白茹^b, 霍德璇^{b c}, 钱正洪^b

a School of Science, Hangzhou Dianzi University, Hangzhou 310018, China;
b Center for Integrated Spintronic Devices, Hangzhou Dianzi University, Hangzhou 310018, China;
c College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China

收稿日期:2014-01-05 修回日期:2014-04-03 出版日期:2014-09-15 发布日期:2014-09-15
基金资助:
Project supported by the Natural Science Foundation of Zhejiang Province, China (Grant No. LY12A01002), the National Natural Science Foundation of China (Grant Nos. 11204058 and 21073162), and the Hangzhou Dianzi University, China (Grant No. KYF09150603).

Magnetic behaviors of cerium oxide-based thin films deposited using electrochemical method

Peng Ying-Zi (彭英姿)^{a b}, Li Yuan (李源)^{a b}, Bai Ru (白茹)^b, Huo De-Xuan (霍德璇)^{b c}, Qian Zheng-Hong (钱正洪)^b

a School of Science, Hangzhou Dianzi University, Hangzhou 310018, China;
b Center for Integrated Spintronic Devices, Hangzhou Dianzi University, Hangzhou 310018, China;
c College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China

Received:2014-01-05 Revised:2014-04-03 Online:2014-09-15 Published:2014-09-15
Contact: Peng Ying-Zi E-mail:yingzip@hdu.edu.cn
Supported by:
Project supported by the Natural Science Foundation of Zhejiang Province, China (Grant No. LY12A01002), the National Natural Science Foundation of China (Grant Nos. 11204058 and 21073162), and the Hangzhou Dianzi University, China (Grant No. KYF09150603).

摘要/Abstract

摘要： Zn and Co multi-doped CeO₂ thin films have been prepared using an anodic electrochemical method. The structures and magnetic behaviors are characterized by several techniques, in which the oxygen states in the lattice and the absorptive oxygen bonds at the surface are carefully examined. The absorptive oxygen bond is about 50% of the total oxygen bond by using a semi-quantitative method. The value of actual stoichiometry δ' is close to 2. The experimental results indicate that the thin films are of a cerium oxide-based solid solution with few oxygen vacancies in the lattice and many absorptive oxygen bonds at the surface. Week ferromagnetic behaviors were evidenced by observed M-H hysteresis loops at room temperature. Furthermore, an evidence of relative ferromagnetic contributions was revealed by the temperature dependence of magnetization. It is believed that the ferromagnetic contributions exhibited in the M-H loops originate from the absorptive oxygen on the surface rather than the oxygen vacancies in the lattice.

关键词: cerium oxide-based thin films, anodic electrochemical method, absorptive oxygen, magnetic behaviors

Abstract: Zn and Co multi-doped CeO₂ thin films have been prepared using an anodic electrochemical method. The structures and magnetic behaviors are characterized by several techniques, in which the oxygen states in the lattice and the absorptive oxygen bonds at the surface are carefully examined. The absorptive oxygen bond is about 50% of the total oxygen bond by using a semi-quantitative method. The value of actual stoichiometry δ' is close to 2. The experimental results indicate that the thin films are of a cerium oxide-based solid solution with few oxygen vacancies in the lattice and many absorptive oxygen bonds at the surface. Week ferromagnetic behaviors were evidenced by observed M-H hysteresis loops at room temperature. Furthermore, an evidence of relative ferromagnetic contributions was revealed by the temperature dependence of magnetization. It is believed that the ferromagnetic contributions exhibited in the M-H loops originate from the absorptive oxygen on the surface rather than the oxygen vacancies in the lattice.

Key words: cerium oxide-based thin films, anodic electrochemical method, absorptive oxygen, magnetic behaviors

中图分类号: (Magnetic semiconductors)

75.50.Pp

82.45.Aa (Electrochemical synthesis) 68.55.-a (Thin film structure and morphology) 75.70.-i (Magnetic properties of thin films, surfaces, and interfaces)

彭英姿, 李源, 白茹, 霍德璇, 钱正洪. Magnetic behaviors of cerium oxide-based thin films deposited using electrochemical method[J]. , 2014, 23(9): 97503-097503.

Peng Ying-Zi (彭英姿), Li Yuan (李源), Bai Ru (白茹), Huo De-Xuan (霍德璇), Qian Zheng-Hong (钱正洪). Magnetic behaviors of cerium oxide-based thin films deposited using electrochemical method[J]. Chin. Phys. B, 2014, 23(9): 97503-097503.

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Magnetic behaviors of cerium oxide-based thin films deposited using electrochemical method

Magnetic behaviors of cerium oxide-based thin films deposited using electrochemical method

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