Microstructure and phase control in Bi-Fe-O multiferroic nanocomposite thin films

M. Murakami; S. Fujino; S. H. Lim; L. G. Salamanca-Riba; M. Wuttig; I. Takeuchi; Bindhu Varughese; H. Sugaya; T. Hasegawa; S. E. Lofland

doi:10.1063/1.2184892

Microstructure and phase control in Bi-Fe-O multiferroic nanocomposite thin films

M. Murakami
, S. Fujino
, S. H. Lim
, L. G. Salamanca-Riba
, M. Wuttig
, I. Takeuchi
, Bindhu Varughese
, H. Sugaya
, T. Hasegawa
, S. E. Lofland

Physics

Research output: Contribution to journal › Article › peer-review

61 Scopus citations

Abstract

We report on the controlled multiphase thin film growth in the Bi-Fe-O system. By varying the deposition oxygen pressure, the dominant phase formed in the film continuously changes from ferroelectric BiFeO ₃ to a mixture of α-Fe ₂O ₃ and ferromagnetic γ-Fe ₂O ₃. X-ray diffraction and high-resolution transmission electron microscopy have revealed that epitaxial multiferroic nanocomposites consisting of BiFeO ₃ and Fe ₂O ₃ are formed when the deposition pressure is ≈5 mTorr. In order to investigate the previously reported anomalous enhancement in magnetization in BiFeO ₃, we have fabricated a thickness gradient pure BiFeO ₃ film. The out-of-plane lattice constant was found to increase continuously as the thickness is decreased from 300 to 5 nm, but no significant enhancement in magnetization was observed.

Original language	English (US)
Article number	112505
Journal	Applied Physics Letters
Volume	88
Issue number	11
DOIs	https://doi.org/10.1063/1.2184892
State	Published - 2006

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.2184892

Cite this

@article{59b4a482139c48a892c5b2e853001de2,

title = "Microstructure and phase control in Bi-Fe-O multiferroic nanocomposite thin films",

abstract = "We report on the controlled multiphase thin film growth in the Bi-Fe-O system. By varying the deposition oxygen pressure, the dominant phase formed in the film continuously changes from ferroelectric BiFeO 3 to a mixture of α-Fe 2O 3 and ferromagnetic γ-Fe 2O 3. X-ray diffraction and high-resolution transmission electron microscopy have revealed that epitaxial multiferroic nanocomposites consisting of BiFeO 3 and Fe 2O 3 are formed when the deposition pressure is ≈5 mTorr. In order to investigate the previously reported anomalous enhancement in magnetization in BiFeO 3, we have fabricated a thickness gradient pure BiFeO 3 film. The out-of-plane lattice constant was found to increase continuously as the thickness is decreased from 300 to 5 nm, but no significant enhancement in magnetization was observed.",

author = "M. Murakami and S. Fujino and Lim, \{S. H.\} and Salamanca-Riba, \{L. G.\} and M. Wuttig and I. Takeuchi and Bindhu Varughese and H. Sugaya and T. Hasegawa and Lofland, \{S. E.\}",

year = "2006",

doi = "10.1063/1.2184892",

language = "English (US)",

volume = "88",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "11",

}

TY - JOUR

T1 - Microstructure and phase control in Bi-Fe-O multiferroic nanocomposite thin films

AU - Murakami, M.

AU - Fujino, S.

AU - Lim, S. H.

AU - Salamanca-Riba, L. G.

AU - Wuttig, M.

AU - Takeuchi, I.

AU - Varughese, Bindhu

AU - Sugaya, H.

AU - Hasegawa, T.

AU - Lofland, S. E.

PY - 2006

Y1 - 2006

N2 - We report on the controlled multiphase thin film growth in the Bi-Fe-O system. By varying the deposition oxygen pressure, the dominant phase formed in the film continuously changes from ferroelectric BiFeO 3 to a mixture of α-Fe 2O 3 and ferromagnetic γ-Fe 2O 3. X-ray diffraction and high-resolution transmission electron microscopy have revealed that epitaxial multiferroic nanocomposites consisting of BiFeO 3 and Fe 2O 3 are formed when the deposition pressure is ≈5 mTorr. In order to investigate the previously reported anomalous enhancement in magnetization in BiFeO 3, we have fabricated a thickness gradient pure BiFeO 3 film. The out-of-plane lattice constant was found to increase continuously as the thickness is decreased from 300 to 5 nm, but no significant enhancement in magnetization was observed.

AB - We report on the controlled multiphase thin film growth in the Bi-Fe-O system. By varying the deposition oxygen pressure, the dominant phase formed in the film continuously changes from ferroelectric BiFeO 3 to a mixture of α-Fe 2O 3 and ferromagnetic γ-Fe 2O 3. X-ray diffraction and high-resolution transmission electron microscopy have revealed that epitaxial multiferroic nanocomposites consisting of BiFeO 3 and Fe 2O 3 are formed when the deposition pressure is ≈5 mTorr. In order to investigate the previously reported anomalous enhancement in magnetization in BiFeO 3, we have fabricated a thickness gradient pure BiFeO 3 film. The out-of-plane lattice constant was found to increase continuously as the thickness is decreased from 300 to 5 nm, but no significant enhancement in magnetization was observed.

UR - https://www.scopus.com/pages/publications/33645159834

UR - https://www.scopus.com/pages/publications/33645159834#tab=citedBy

U2 - 10.1063/1.2184892

DO - 10.1063/1.2184892

M3 - Article

AN - SCOPUS:33645159834

SN - 0003-6951

VL - 88

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 11

M1 - 112505

ER -

Microstructure and phase control in Bi-Fe-O multiferroic nanocomposite thin films

Abstract

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