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- W2039220413 abstract "Recently, we have reported amorphization-induced ferromagnetism in a magnetic oxide; whereas crystalline ${text{EuTiO}}_{3}$ is an antiferromagnet, its amorphous counterpart shows a ferromagnetic transition. In this paper, we have investigated the magnetic properties of amorphous ${text{EuO-TiO}}_{2}$ system in detail. The present compounds, i.e., amorphous ${text{EuTiO}}_{3}$ and ${text{Eu}}_{2}{text{TiO}}_{4}$, exhibit a paramagnetic-ferromagnetic transition followed by a spin-glass transition upon cooling down, thereby being characterized as reentrant ferromagnets. Interestingly, the magnetic ordering temperatures of amorphous ${text{EuTiO}}_{3}$ and ${text{Eu}}_{2}{text{TiO}}_{4}$ are comparable to and higher than those of their crystalline counterparts, respectively, indicating the enhancement of ferromagnetic interactions by amorphization. The origin of these features is discussed in terms of both the essential structural difference between amorphous and crystalline oxides and the magnetism unique to the crystalline ${text{EuO-TiO}}_{2}$ compounds. We also find a correlation between the magnitude of ferromagnetic interactions and the covalency of Eu-O bonds." @default.
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- W2039220413 date "2010-12-02" @default.
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- W2039220413 title "Impact of amorphization on the magnetic properties of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mtext>EuO-TiO</mml:mtext></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>system" @default.
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- W2039220413 doi "https://doi.org/10.1103/physrevb.82.224403" @default.
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