TY - JOUR
T1 - Enhancement of the Magnetoelectric Effect Using the Dynamic Jahn-Teller Effect in a Transition-Metal Complex
AU - Otsuki, Yasunao
AU - Kimura, Shojiro
AU - Awaji, Satoshi
AU - Nakano, Motohiro
N1 - Funding Information:
The authors thank Professor M. Matsumoto and Professor M. Koga for their valuable discussions. The experiments were performed in the GIMRT proposal, Institute for Materials Research, Tohoku University (No. 20H0415 and No. 202012-HMKGE-0405). This work was partially supported by the Grant-in-Aid for Scientific Research (Grants No. 19H01834 and No. 21H01026) from MEXT Japan and the Grant Fund for Research and Education of Institute for Materials Research, Tohoku University (No. J190001231).
Publisher Copyright:
© 2022 American Physical Society.
PY - 2022/3/18
Y1 - 2022/3/18
N2 - In this Letter, a novel mechanism to enhance the magnetoelectric (ME) coupling between electric polarization and magnetism using the dynamic Jahn-Teller (JT) effect is demonstrated. Electric polarization of over 100 μC/m2 is induced by the magnetic field owing to the second-order ME effect in the noncentrosymmetric transition metal complex [MnIII(taa)]. This appearance of electric polarization does not require magnetic order in contrast to the linear ME effect in ME multiferroic materials. The value of the electric polarization is 1 order larger than that induced by the second-order ME effect, which originates from the p-d hybridization. Our calculation, taking into account the single-ion-type magnetic anisotropy originating from the spin-orbit interaction and ferrodistortive intermolecular interaction, verifies that the alignment of the JT distortion by the magnetic field results in the large electric polarization observed. Thus, our results provide a new method to gain strong ME coupling by tuning the atomic displacement using a magnetic field.
AB - In this Letter, a novel mechanism to enhance the magnetoelectric (ME) coupling between electric polarization and magnetism using the dynamic Jahn-Teller (JT) effect is demonstrated. Electric polarization of over 100 μC/m2 is induced by the magnetic field owing to the second-order ME effect in the noncentrosymmetric transition metal complex [MnIII(taa)]. This appearance of electric polarization does not require magnetic order in contrast to the linear ME effect in ME multiferroic materials. The value of the electric polarization is 1 order larger than that induced by the second-order ME effect, which originates from the p-d hybridization. Our calculation, taking into account the single-ion-type magnetic anisotropy originating from the spin-orbit interaction and ferrodistortive intermolecular interaction, verifies that the alignment of the JT distortion by the magnetic field results in the large electric polarization observed. Thus, our results provide a new method to gain strong ME coupling by tuning the atomic displacement using a magnetic field.
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U2 - 10.1103/PhysRevLett.128.117601
DO - 10.1103/PhysRevLett.128.117601
M3 - Article
C2 - 35363034
AN - SCOPUS:85126961696
SN - 0031-9007
VL - 128
JO - Physical Review Letters
JF - Physical Review Letters
IS - 11
M1 - 117601
ER -