Electric-Field Control of Magnetization, Jahn-Teller Distortion, and Orbital Ordering in Ferroelectric Ferromagnets
- Univ. of Arkansas, Fayetteville, AR (United States); Nanjing Univ. (China)
- Univ. of Arkansas, Fayetteville, AR (United States)
- Nanjing Univ. (China)
- Fudan Univ., Shanghai (China);Collaborative Innovation Center of Advanced Microstructures, Nanjing (China)
- Luxembourg Inst. of Science and Technology (Luxembourg); Univ. of Luxembourg, Belvaux (Luxembourg)
- Univ. of Arkansas, Fayetteville, AR (United States); Nanjing Univ. (China); Collaborative Innovation Center of Advanced Microstructures, Nanjing (China)
Controlling the direction of the magnetization by an electric field in multiferroics that are both ferroelectric and strongly ferromagnetic will open the door to the design of the next generation of spintronics and memory devices. Using first-principles simulations, we report that the discovery that the PbTiO3/LaTiO3 (PTO/LTO) superlattice possesses such highly desired control, as evidenced by the electric-field-induced rotation of 90° and even a possible full reversal of its magnetization in some cases. Moreover, such systems also exhibit Jahn-Teller distortions, as well as orbital orderings, that are switchable by the electric field, therefore making PTO/LTO of importance for the tuning of electronic properties too. Here, the origin for such striking electric-field controls of magnetization, Jahn-Teller deformations, and orbital orderings resides in the existence of three different types of energetic coupling: one coupling polarization with antiphase and in-phase oxygen octahedral tiltings, a second one coupling polarization with antiphase oxygen octahedra tilting and Jahn-Teller distortions, and finally a biquadratic coupling between antiphase oxygen octahedral tilting and magnetization.
- Research Organization:
- Univ. of Arkansas, Fayetteville, AR (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0002220; INTER/MOBILITY/15/9890527; 2015CB921203
- OSTI ID:
- 1610672
- Alternate ID(s):
- OSTI ID: 1546415
- Journal Information:
- Physical Review Letters, Vol. 122, Issue 24; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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