Possible Weak Ferromagnetism in Pr2-x Ce x CuO4 Nanocrystals at Normal State

7th Nanoscience and Nanotechnology Symposium

物理学;材料科学

Triono, B.^1 ; Putra, P.E.D.^1 ; Irfanita, R.^1 ; Baqiya, M.A.^1 ; Darminto^1

Department of Physics, Institut Teknologi Sepuluh Nopember (ITS), ITS Campus, Keputih-Sukolilo, Surabaya

60111, Indonesia^1

关键词: Crystal size;    Ferromagnetic behaviors;    Impurity phasis;    Normal state;    Phase formations;    Pr2-xCexCuO4;    Vibrating sample magnetometer;    Weak ferromagnetism;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/395/1/012026/pdf
DOI  :  10.1088/1757-899X/395/1/012026

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Nano-crystals of Pr2-xCexCuO4 (PCCO) with x = 0 and 0.15 have been successfully synthesized by chemically dissolved method employing HNO3 as dissolving agent. The PCCO samples were calcinated at 900 - 1000°C for 5 - 30 h. The PCCO samples were characterized by x-ray diffraction (XRD) and vibrating sample magnetometer (VSM) for investigating the phase formation and crystals size, and for studying the magnetic properties at normal state, respectively. Based on the XRD data, PCCO with x = 0.10 and 0.15 calcinated at temperature of 1000°C for 15 h show no impurity phases with crystal size of around 50 nm using Rietveld analysis. It is shown that the non-superconductive PCCO nano-crystals have very weak ferromagnetic behavior at room temperature. This phenomenon is probably due to magnetic moments rising from oxygen vacancies of the nanocrystals surface.