Influence of doping on the spin dynamics and magnetoelectric effect in hexagonal Y0.7Lu0.3Mn O3

W. Tian; Guotai Tan; Liu Liu; Jinxing Zhang; Barry Winn; Tao Hong; J. A. Fernandez-Baca; Chenglin Zhang; Pengcheng Dai

doi:10.1103/PhysRevB.89.144417

Influence of doping on the spin dynamics and magnetoelectric effect in hexagonal Y0.7Lu0.3Mn O3

W. Tian, Guotai Tan, Liu Liu, Jinxing Zhang, Barry Winn, Tao Hong, J. A. Fernandez-Baca, Chenglin Zhang, Pengcheng Dai

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Abstract

We use inelastic neutron scattering and dielectric constant measurements to study the doping influence on the spin dynamics and magnetoelectric (ME) effect in hexagonalY0.7Lu0.3MnO3. In undoped YMnO3 and LuMnO3, the Mn trimerization distortion has been suggested to play a key role in determining the magnetic structure and the magnetoelectric effect. In Y0.7Lu0.3MnO3, at the antiferromagnetic zone center, we observed a much smaller Δ12≈0.52 meV gap (which is ∼2.5 meV for both YMnO3 and LuMnO3) that coincides with a weaker in-plane dielectric anomaly at TN; both can be attributed to a weaker Mn trimerization distortion in Y0.7Lu0.3MnO3 compared to YMnO3 and LuMnO3. The results provide strong evidence that the magnitude of ME coupling is linked to the strength of the trimerization distortion, suggesting the Mn trimerization is responsible for the ME effect in Y1-yLuyMnO3.

Original language	English
Article number	144417
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	89
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.89.144417
State	Published - Apr 18 2014

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title = "Influence of doping on the spin dynamics and magnetoelectric effect in hexagonal Y0.7Lu0.3Mn O3",

abstract = "We use inelastic neutron scattering and dielectric constant measurements to study the doping influence on the spin dynamics and magnetoelectric (ME) effect in hexagonalY0.7Lu0.3MnO3. In undoped YMnO3 and LuMnO3, the Mn trimerization distortion has been suggested to play a key role in determining the magnetic structure and the magnetoelectric effect. In Y0.7Lu0.3MnO3, at the antiferromagnetic zone center, we observed a much smaller Δ12≈0.52 meV gap (which is ∼2.5 meV for both YMnO3 and LuMnO3) that coincides with a weaker in-plane dielectric anomaly at TN; both can be attributed to a weaker Mn trimerization distortion in Y0.7Lu0.3MnO3 compared to YMnO3 and LuMnO3. The results provide strong evidence that the magnitude of ME coupling is linked to the strength of the trimerization distortion, suggesting the Mn trimerization is responsible for the ME effect in Y1-yLuyMnO3.",

author = "W. Tian and Guotai Tan and Liu Liu and Jinxing Zhang and Barry Winn and Tao Hong and Fernandez-Baca, {J. A.} and Chenglin Zhang and Pengcheng Dai",

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doi = "10.1103/PhysRevB.89.144417",

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T1 - Influence of doping on the spin dynamics and magnetoelectric effect in hexagonal Y0.7Lu0.3Mn O3

AU - Tian, W.

AU - Tan, Guotai

AU - Liu, Liu

AU - Zhang, Jinxing

AU - Winn, Barry

AU - Hong, Tao

AU - Fernandez-Baca, J. A.

AU - Zhang, Chenglin

AU - Dai, Pengcheng

PY - 2014/4/18

Y1 - 2014/4/18

N2 - We use inelastic neutron scattering and dielectric constant measurements to study the doping influence on the spin dynamics and magnetoelectric (ME) effect in hexagonalY0.7Lu0.3MnO3. In undoped YMnO3 and LuMnO3, the Mn trimerization distortion has been suggested to play a key role in determining the magnetic structure and the magnetoelectric effect. In Y0.7Lu0.3MnO3, at the antiferromagnetic zone center, we observed a much smaller Δ12≈0.52 meV gap (which is ∼2.5 meV for both YMnO3 and LuMnO3) that coincides with a weaker in-plane dielectric anomaly at TN; both can be attributed to a weaker Mn trimerization distortion in Y0.7Lu0.3MnO3 compared to YMnO3 and LuMnO3. The results provide strong evidence that the magnitude of ME coupling is linked to the strength of the trimerization distortion, suggesting the Mn trimerization is responsible for the ME effect in Y1-yLuyMnO3.

AB - We use inelastic neutron scattering and dielectric constant measurements to study the doping influence on the spin dynamics and magnetoelectric (ME) effect in hexagonalY0.7Lu0.3MnO3. In undoped YMnO3 and LuMnO3, the Mn trimerization distortion has been suggested to play a key role in determining the magnetic structure and the magnetoelectric effect. In Y0.7Lu0.3MnO3, at the antiferromagnetic zone center, we observed a much smaller Δ12≈0.52 meV gap (which is ∼2.5 meV for both YMnO3 and LuMnO3) that coincides with a weaker in-plane dielectric anomaly at TN; both can be attributed to a weaker Mn trimerization distortion in Y0.7Lu0.3MnO3 compared to YMnO3 and LuMnO3. The results provide strong evidence that the magnitude of ME coupling is linked to the strength of the trimerization distortion, suggesting the Mn trimerization is responsible for the ME effect in Y1-yLuyMnO3.

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JO - Physical Review B - Condensed Matter and Materials Physics

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Influence of doping on the spin dynamics and magnetoelectric effect in hexagonal Y0.7Lu0.3Mn O3

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