Magnetoelectricity of CoFe2O4 and tetragonal phase BiFeO3 nanocomposites prepared by pulsed laser deposition

Gao, Min; Viswan, Ravindranath; Tang, Xiao; Leung, Chung Ming; Li, Jiefang; Viehland, D.

doi:10.1038/s41598-017-18788-8

Magnetoelectricity of CoFe₂O₄ and tetragonal phase BiFeO₃ nanocomposites prepared by pulsed laser deposition

Journal Article · Tue Jan 09 23:00:00 EST 2018 · Scientific Reports

DOI:https://doi.org/10.1038/s41598-017-18788-8· OSTI ID:1500113

^[1]; Viswan, Ravindranath ^[2]; ^[2]; ^[2]; Li, Jiefang ^[2]; Viehland, D. ^[2]

Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States); OSTi
Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)

The coupling between the tetragonal phase (T-phase) of BiFeO₃ (BFO) and CoFe₂O₄ (CFO) in magnetoelectric heterostructures has been studied. Bilayers of CFO and BFO were deposited on (001) LaAlO₃ single crystal substrates by pulsed laser deposition. After 30 min of annealing, the CFO top layer exhibited a T-phase-like structure, developing a platform-like morphology with BFO. Magnetic hysteresis loops exhibited a strong thickness effect of the CFO layer on the coercive field, in particular along the out-of-plane direction. Magnetic force microscopy images revealed that the T-phase CFO platform contained multiple magnetic domains, which could be tuned by applying a tip bias. Here, a combination of shape, strain, and exchange coupling effects are used to explain the observations.

View Accepted Manuscript (DOE)

Research Organization:: Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-06ER46290

OSTI ID:: 1500113

Journal Information:: Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 8; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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