High Temperature Multiferroicity in Cupric Oxide

International Conference on Recent Trends in Physics 2016

Pandey, Suchita^1 ; Awasthi, A.M.^1

Thermodynamics Laboratory, UGC-DAE Consortium for Scientific Research, Khandwa Road, Indore

452 001, India^1

关键词: Antiferromagnetic transition;    Cupric oxide;    Heat capacity measurements;    High temperature;    Monoclinic structures;    Multiferroic materials;    Space Groups;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/755/1/012022/pdf
DOI  :  10.1088/1742-6596/755/1/012022

来源: IOP

【 摘 要 】

Multiferroic materials where magnetic and electrical orders coexist have been subject of extensive studies during last few years. Non-collinear/spiral magnetic structures are expected to exhibit concurrent ferroelectricity. CuO which adopts the structure as mineral Tenorite, with monoclinic structure (space group C2/c), has been reported to possess two high temperature antiferromagnetic (AFM) transitions, TN1∼ 213 K & TN2∼ 230 K. Below the first AFM transition, magnetic structure is reported to be collinear while below later one magnetic structure is non-collinear. In the present study observation of strong anomalies in dielectric and heat capacity measurements around both the TN'sconfirm magnetically induced ferroelectricity in CuO.