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

Department of Materials Science and Engineering

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

3 Citations (Scopus)

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
Publication status	Published - 1999 Apr 15
Event	Proceedings of the 43rd Annual Conference on Magnetism and Magnetic Materials - Miami, FL, USA Duration: 1998 Nov 9 → 1998 Nov 12

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

Access to Document

10.1063/1.369949

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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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