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• W2029156158 abstract "Room-temperature ferromagnetism has been observed in undoped $mathrm{GaN}$ and $mathrm{CdS}$ semiconductor nanoparticles of different sizes with the average diameter in the range $10--25phantom{rule{0.3em}{0ex}}mathrm{nm}$. These nanoparticles were synthesized by simple routes and thoroughly characterized by various techniques. Magnetization measurements at room temperature show that these nanoparticles are ferromagnetic with a saturation magnetization of $ensuremath{sim}{10}^{ensuremath{-}3}phantom{rule{0.3em}{0ex}}mathrm{emu}∕mathrm{gm}$, which is comparable to that observed in nanoparticles of nonmagnetic oxides. On the other hand, agglomerated particles of $mathrm{GaN}$ and $mathrm{CdS}$ exhibit diamagnetism or ferromagnetism with small saturation moments. Furthermore, the saturation magnetic moment decreases with the increase in particles size, suggesting that ferromagnetism is due to the defects confined to the surface of the nanoparticles, while the core of the particles remains diamagnetic. The observation of ferromagnetism is consistent with the prediction that Ga vacancies in $mathrm{GaN}$ give rise to a ferromagnetic ground state." @default.
• W2029156158 created "2016-06-24" @default.
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• W2029156158 date "2008-05-29" @default.
• W2029156158 modified "2023-10-16" @default.
• W2029156158 title "Room-temperature ferromagnetism in undoped<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi>GaN</mml:mi></mml:mrow></mml:math>and<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi>CdS</mml:mi></mml:mrow></mml:math>semiconductor nanoparticles" @default.
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• W2029156158 doi "https://doi.org/10.1103/physrevb.77.201306" @default.
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