Grain boundaries and growth kinetics of polycrystalline ferrimagnetic oxides with chemical additives

Yong S. Cho; David T. Hoelzer; Vernon L. Burdick; Vasantha R.W. Amarakoon

doi:10.1063/1.369949

Grain boundaries and growth kinetics of polycrystalline ferrimagnetic oxides with chemical additives

Yong S. Cho, David T. Hoelzer, Vernon L. Burdick, Vasantha R.W. Amarakoon

Research output: Contribution to journal › Conference article › peer-review

3 Scopus citations

Abstract

Small amounts of additives of MnO₂ and SiO₂ derived by a sol-gel reaction caused two ferrimagnetic materials, Y₂Gd₁Fe₅O₁₂ and Li_0.3Zn_0.4Fe_2.3O₄ to have different microstructural characteristics. The chemical additives were thought to act as a grain growth inhibitor by segregating Si-rich precipitates along the grain boundaries in the case of Y₂Gd₁Fe₅O₁₂, whereas the same additives were proven to assist grain growth by forming a Si- and Fe-rich glassy phase at the grain boundaries for Li_0.3Zn_0.4Fe_2.3O₄. Quantitative analysis regarding the behavior of grain growth supported the observed microstructural changes.

Original language	English
Pages (from-to)	5220-5222
Number of pages	3
Journal	Journal of Applied Physics
Volume	85
Issue number	8 II A
DOIs	https://doi.org/10.1063/1.369949
State	Published - Apr 15 1999
Externally published	Yes
Event	Proceedings of the 43rd Annual Conference on Magnetism and Magnetic Materials - Miami, FL, USA Duration: Nov 9 1998 → Nov 12 1998

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title = "Grain boundaries and growth kinetics of polycrystalline ferrimagnetic oxides with chemical additives",

abstract = "Small amounts of additives of MnO2 and SiO2 derived by a sol-gel reaction caused two ferrimagnetic materials, Y2Gd1Fe5O12 and Li0.3Zn0.4Fe2.3O4 to have different microstructural characteristics. The chemical additives were thought to act as a grain growth inhibitor by segregating Si-rich precipitates along the grain boundaries in the case of Y2Gd1Fe5O12, whereas the same additives were proven to assist grain growth by forming a Si- and Fe-rich glassy phase at the grain boundaries for Li0.3Zn0.4Fe2.3O4. Quantitative analysis regarding the behavior of grain growth supported the observed microstructural changes.",

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T1 - Grain boundaries and growth kinetics of polycrystalline ferrimagnetic oxides with chemical additives

AU - Cho, Yong S.

AU - Hoelzer, David T.

AU - Burdick, Vernon L.

AU - Amarakoon, Vasantha R.W.

PY - 1999/4/15

Y1 - 1999/4/15

N2 - Small amounts of additives of MnO2 and SiO2 derived by a sol-gel reaction caused two ferrimagnetic materials, Y2Gd1Fe5O12 and Li0.3Zn0.4Fe2.3O4 to have different microstructural characteristics. The chemical additives were thought to act as a grain growth inhibitor by segregating Si-rich precipitates along the grain boundaries in the case of Y2Gd1Fe5O12, whereas the same additives were proven to assist grain growth by forming a Si- and Fe-rich glassy phase at the grain boundaries for Li0.3Zn0.4Fe2.3O4. Quantitative analysis regarding the behavior of grain growth supported the observed microstructural changes.

AB - Small amounts of additives of MnO2 and SiO2 derived by a sol-gel reaction caused two ferrimagnetic materials, Y2Gd1Fe5O12 and Li0.3Zn0.4Fe2.3O4 to have different microstructural characteristics. The chemical additives were thought to act as a grain growth inhibitor by segregating Si-rich precipitates along the grain boundaries in the case of Y2Gd1Fe5O12, whereas the same additives were proven to assist grain growth by forming a Si- and Fe-rich glassy phase at the grain boundaries for Li0.3Zn0.4Fe2.3O4. Quantitative analysis regarding the behavior of grain growth supported the observed microstructural changes.

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VL - 85

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T2 - Proceedings of the 43rd Annual Conference on Magnetism and Magnetic Materials

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ER -

Grain boundaries and growth kinetics of polycrystalline ferrimagnetic oxides with chemical additives

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