Change in magnetic properties induced by swift heavy ion irradiation in CeO $_{2}$

Shimizu, Hirotaka*; Kosugi, Shinya*; Tahara, Yuki*; Yasunaga, Kazufumi*; Kaneta, Yasunori*; Ishikawa, Norito ; Hori, Fuminobu*; Matsui, Toshiyuki*; Iwase, Akihiro*

We have studied the magnetic properties of pure CeO $_{2}$ irradiated with swift heavy ions. Experiment a results showed that the ferromagnetism was induced even at room temperature by 200 MeV Xe ion irradiation. The value of saturation magnetization, Ms, systematically changes as a function of ion-fluence. The X-ray diffraction (XRD) spectra show that the lattice constant of CeO $_{2}$ increases with increasing ion-fluence. This result and our previous XPS result show that the ion-irradiation produced oxygen vacancies. The present study implies that the ferromagnetic behavior of the ion-irradiated CeO $_{2}$ is attributed to the magnetic moments of localized 4f electrons on Ce $^{3+}$ atoms, which are related to oxygen vacancies.

Language	:	English
Journal	:	Nuclear Instruments and Methods in Physics Research B
Volume	:	286
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Pages	:	p.291 - 294
Publication Year/Month	:	2012/09
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Paper URL	:	https://doi.org/10.1016/j.nimb.2012.01.008
DOI for research data	:	Link to research data related to this paper/report.
Keywords	:	no keyword
Research Facility	:	タンデム加速器
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Registration No. : AA20120160
JAEA Abstracts No. : 41000151
Paper Submission No. : 11753

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