Spin-flip and magnetoelectric coupling in acentric and non-polar Pb2MnO4
Abstract
Acentric and non-polar Pb2MnO4 was predicted to exhibit unique multipiezo induced magnetoelectric (ME) phenomena. Here, we present the results of measurements from magnetization as well as the dielectric, as a function of temperature (T), magnetic field (H), pressure (P), and electric field (E) primarily to address the ME coupling and identify the underlying mechanism behind this phenomenon. Magnetization measurements reveal the antiferromagnetic (AFM) ordering of Mn4+ spins at TN = 17 K. For TN 17 K, a robustly multiple partial spin-flip transitions were also observed. The existence of ME coupling is supported by the observed dielectric anomaly near TN. The lattice dielectric response is strongly influenced by spin-flip transitions that trigger the pronounced ME coupling below the TN. The magnetic-field-induced ME phenomenon in Pb2MnO4 has been ascribed to the strong coupling of lattice polarization with the magnetic interactions and thereby offers a route to attain novel ME materials.
This work was supported by the Ministry of Science and Technology, Taiwan, under Grant No. MOST: 106 - 2112 - M - 110 - 013 - MY3. Author thanks the NSRRC during the XAS measurements.- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- 2019
- Bibcode:
- 2019APS..MARG70164Y