Transforming from paramagnetism to room temperature ferromagnetism in CuO by ball milling | Zendy

Daqiang Gao | Zendy; Zhaolong Yang | Zendy; Jing Zhang | Zendy; Guijin Yang | Zendy; Zhonghua Zhu | Zendy; Jing Qi | Zendy; Mingsu Si | Zendy; Desheng Xue | Zendy

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Transforming from paramagnetism to room temperature ferromagnetism in CuO by ball milling

Author(s) -

Daqiang Gao,

Zhaolong Yang,

Jing Zhang,

Guijin Yang,

Zhonghua Zhu,

Jing Qi,

Mingsu Si,

Desheng Xue

Publication year - 2011

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.3670360

Subject(s) - ferromagnetism , paramagnetism , materials science , annealing (glass) , condensed matter physics , x ray photoelectron spectroscopy , dopant , magnetization , ball mill , valence (chemistry) , oxygen , metallurgy , nuclear magnetic resonance , doping , magnetic field , chemistry , optoelectronics , physics , organic chemistry , quantum mechanics

In this work, we experimentally demonstrate that it is possible to induce ferromagnetism in CuO by ball milling without any ferromagnetic dopant. The magnetic measurements indicate that paramagnetic CuO is driven to the ferromagnetic state at room temperature by ball milling gradually. The saturation magnetization of the milled powders is found to increase with expanding the milling time and then decrease by annealing under atmosphere. The fitted X-ray photoelectron spectroscopy results indicate that the observed induction and weaken of the ferromagnetism shows close relationship with the valence charged oxygen vacancies (Cu1+-VO) in CuO

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