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https://doi.org/10.3938/NPSM.69.462
Magnetic Properties of a PbWO$_4$:Ce$^{3+}$ Single Crystal Doped with Ce$^{3+}$ ion
New Phys.: Sae Mulli 2019; 69: 462~467
Published online May 31, 2019;  https://doi.org/10.3938/NPSM.69.462
© 2019 New Physics: Sae Mulli.

Tae Ho YEOM*

Department of Laser and Optical Information Engineering, Cheongju University, Cheongju 28503, Korea
Correspondence to: thyeom@cju.ac.kr
Received March 14, 2019; Revised May 2, 2019; Accepted May 2, 2019.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Temperature dependences of the $g$ value and the linewidth for cerium (Ce$^{3+}$) ions in PbWO$_4$:Ce$^{3+}$ single crystals have been investigated by means of an X-band electron paramagnetic resonance (EPR) spectrometer. No change in the $g$ value of the Ce$^{3+}$ impurity ion could be detect within the experimental accuracy in the temperature range from 4 K $\sim$ to 65 K. The linewidth of the Ce$^{3+}$ resonance spectrition increases with increasing temperature due to the interaction of the Ce$^{3+}$ electron spins with the acoustic phonons in the PbWO$_4$ crystal. The magnetic moments of the Ce$^{3+}$ ions in PbWO$_4$:Ce$^{3+}$ single crystals were obtained as a function of the magnetic strength $H$ by means of a magnetic property measurement system (MPMS). The magnetic susceptibilities of the PbWO$_4$:Ce$^{3+}$ crystal at 4.25 K and 5 K are $\chi$$_{ce}$ = 1.62$\times$10$^{-5}$ emu/cm$^3$Oe and $\chi$$_{ce}$ = 1.39$\times$10$^{-5}$ emu/cm$^3$Oe, respectively. The magnetic susceptibility $\chi$ at $H$ = 50 kOe of the cerium ions in PbWO$_4$:Ce$^{3+}$ single crystals was also obtained within the temperature range from 4.25 K to 300 K, and was found to obey the Curie law, which shows the temperature dependence of $\chi$$_{ce}$ as ($\propto$$T$$^{-1}$).
PACS numbers: 76. 30.v, 76.30.kg
Keywords: PbWO$_4$ single crystal, Ce$^{3+}$ impurity ion, EPR, magnetic susceptibility


May 2019, 69 (5)
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