| Full text | |
| Author(s): |
Gastaldo, Vinicius Pascotto
;
Klein, Yannick
;
Baptiste, Benoit
;
Cabassi, Riccardo
;
Gilioli, Edmondo
;
Gauzzi, Andrea
;
de Oliveira, Adilson J. A.
Total Authors: 7
|
| Document type: | Journal article |
| Source: | PHYSICAL REVIEW B; v. 102, n. 16, p. 5-pg., 2020-10-30. |
| Abstract | |
By means of magnetic, specific heat, and pyroelectric measurements, we report on magnetic ferroelectricity in the quadruple perovskite NaMn7O12, characterized by a canted antiferromagnetic (AFM) CE structure. Surprisingly, ferroelectricity is concomitant to a dramatic broadening of the magnetic hysteresis loop, well below the AFM ordering temperature. This unconventional behavior shows that the formation of ferroelectric domains is induced by the symmetric exchange interaction in the local scale, e.g., at magnetic domain boundaries or defects. The value of electric polarization, P = 0.027 mu C cm(2), measured in polycrystalline samples is comparatively large as compared to other magnetic multiferroics, suggesting that the above scenario is promising indeed for the rational design of practical multiferroic materials. (AU) | |
| FAPESP's process: | 17/24995-2 - Magnetism in multifunctional materials |
| Grantee: | Adilson Jesus Aparecido de Oliveira |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 13/07296-2 - CDMF - Center for the Development of Functional Materials |
| Grantee: | Elson Longo da Silva |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |
| FAPESP's process: | 13/27097-4 - Magnetic and electrical properties of multiferroic systems: single-phase and composites |
| Grantee: | Vinicius Pascotto Gastaldo |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |
| FAPESP's process: | 15/21206-1 - Growth of thin films of quadruple multiferroic perovskite and investigation of the electron-phonon coupling using thermal and optics measurements. |
| Grantee: | Vinicius Pascotto Gastaldo |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate (Direct) |
| FAPESP's process: | 12/21171-5 - Study of the magnetoelectric coupling in quadruple perovskites |
| Grantee: | Adilson Jesus Aparecido de Oliveira |
| Support Opportunities: | Research Grants - Visiting Researcher Grant - International |