Lattice mismatch induced strained phase for magnetization, exchange bias and polarization in multiferroic BiFeO3

Ruimin Yao; Chuanbao Cao; Chunrui Zheng; Qiang Lei

doi:10.1039/c3ra42790k

Lattice mismatch induced strained phase for magnetization, exchange bias and polarization in multiferroic BiFeO₃

Ruimin Yao, Chuanbao Cao^*, Chunrui Zheng, Qiang Lei

^*Corresponding author for this work

School of Material Science and Engineering

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

16 Citations (Scopus)

Abstract

We have utilized the lattice mismatch between two adjacent nanocrystals in polycrystalline BFO ceramics to introduce a layer of highly strained BFO phase by taking advantage of crystal growth course. Therefore, a spin-valve like structure has been fabricated that consists of ferromagnetic phase (highly strained BFO phase)/antiferromagnetic phase (bulk BFO nanoparticles), without any substrates or alloy layers. BFO ceramics can present an exchange biasing effect ((|H_EB|) ∼ 36 Oe) with an enhanced magnetic moment (M _s ∼ 0.11 μ_B Fe^-1) and in addition saturated polarization (2P_r ∼ 57.4 μC cm^-2) at room temperature. A low working electric field (E_c ∼ 4.8 kV cm ^-1) shows an advantage of low energy consumption in application. These results imply that there is potential for room temperature applications of single phase BFO with exchange biasing, enhanced magnetization and saturated polarization.

Original language	English
Pages (from-to)	24231-24236
Number of pages	6
Journal	RSC Advances
Volume	3
Issue number	46
DOIs	https://doi.org/10.1039/c3ra42790k
Publication status	Published - 14 Dec 2013

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title = "Lattice mismatch induced strained phase for magnetization, exchange bias and polarization in multiferroic BiFeO3",

abstract = "We have utilized the lattice mismatch between two adjacent nanocrystals in polycrystalline BFO ceramics to introduce a layer of highly strained BFO phase by taking advantage of crystal growth course. Therefore, a spin-valve like structure has been fabricated that consists of ferromagnetic phase (highly strained BFO phase)/antiferromagnetic phase (bulk BFO nanoparticles), without any substrates or alloy layers. BFO ceramics can present an exchange biasing effect ((|HEB|) ∼ 36 Oe) with an enhanced magnetic moment (M s ∼ 0.11 μB Fe-1) and in addition saturated polarization (2Pr ∼ 57.4 μC cm-2) at room temperature. A low working electric field (Ec ∼ 4.8 kV cm -1) shows an advantage of low energy consumption in application. These results imply that there is potential for room temperature applications of single phase BFO with exchange biasing, enhanced magnetization and saturated polarization.",

author = "Ruimin Yao and Chuanbao Cao and Chunrui Zheng and Qiang Lei",

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T1 - Lattice mismatch induced strained phase for magnetization, exchange bias and polarization in multiferroic BiFeO3

AU - Yao, Ruimin

AU - Cao, Chuanbao

AU - Zheng, Chunrui

AU - Lei, Qiang

PY - 2013/12/14

Y1 - 2013/12/14

N2 - We have utilized the lattice mismatch between two adjacent nanocrystals in polycrystalline BFO ceramics to introduce a layer of highly strained BFO phase by taking advantage of crystal growth course. Therefore, a spin-valve like structure has been fabricated that consists of ferromagnetic phase (highly strained BFO phase)/antiferromagnetic phase (bulk BFO nanoparticles), without any substrates or alloy layers. BFO ceramics can present an exchange biasing effect ((|HEB|) ∼ 36 Oe) with an enhanced magnetic moment (M s ∼ 0.11 μB Fe-1) and in addition saturated polarization (2Pr ∼ 57.4 μC cm-2) at room temperature. A low working electric field (Ec ∼ 4.8 kV cm -1) shows an advantage of low energy consumption in application. These results imply that there is potential for room temperature applications of single phase BFO with exchange biasing, enhanced magnetization and saturated polarization.

AB - We have utilized the lattice mismatch between two adjacent nanocrystals in polycrystalline BFO ceramics to introduce a layer of highly strained BFO phase by taking advantage of crystal growth course. Therefore, a spin-valve like structure has been fabricated that consists of ferromagnetic phase (highly strained BFO phase)/antiferromagnetic phase (bulk BFO nanoparticles), without any substrates or alloy layers. BFO ceramics can present an exchange biasing effect ((|HEB|) ∼ 36 Oe) with an enhanced magnetic moment (M s ∼ 0.11 μB Fe-1) and in addition saturated polarization (2Pr ∼ 57.4 μC cm-2) at room temperature. A low working electric field (Ec ∼ 4.8 kV cm -1) shows an advantage of low energy consumption in application. These results imply that there is potential for room temperature applications of single phase BFO with exchange biasing, enhanced magnetization and saturated polarization.

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ER -

Lattice mismatch induced strained phase for magnetization, exchange bias and polarization in multiferroic BiFeO₃

Abstract

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