Ferromagnetic-nonmagnetic and metal-insulator phase transitions at the interfaces of KTaO{sub 3} and PbTiO{sub 3}

Journal Article · Tue Oct 21 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4898738· OSTI ID:22305828

Yang, Yi; Chen, Jin-Feng; Hu, Lei ^[1]; Lin, Chen-Sheng; Cheng, Wen-Dan ^[1]

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1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 (China)

We studied the electronic and magnetic properties of hole doped KTaO{sub 3}/PbTiO{sub 3} interface using density functional theory methods. Ferromagnetic-nonmagnetic phase transition and metal-insulator phase transition occur simultaneously at the interface with ferroelectric polarization reversal. Furthermore, these two transitions are coupled with each other because hole doping with large concentration of holes gives rise to ferromagnetism. The interfacial magnetization, which is proportional to hole concentration at the interface, can be tuned by ferroelectric polarization, leading to strong intrinsic magnetoelectric effect at the interface of originally nonmagnetic KTaO{sub 3} and PbTiO{sub 3}.

• OSTI ID: 22305828
• Journal Information: Journal of Applied Physics, Vol. 116, Issue 15; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DENSITY FUNCTIONAL METHOD
DOPED MATERIALS
ELECTRICAL PROPERTIES
FERROELECTRIC MATERIALS
FERROMAGNETISM
INTERFACES
LEAD COMPOUNDS
MAGNETIC PROPERTIES
MAGNETIZATION
METALS
PHASE TRANSFORMATIONS
POLARIZATION
POTASSIUM COMPOUNDS
P-TYPE CONDUCTORS
TANTALATES
TITANATES