Striped Multiferroic Phase in Double-Exchange Model for Quarter-Doped Manganites

Journal Article · Thu Jan 01 04:00:00 EST 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.103.107204· OSTI ID:971240

Dong, Shuai ^[1]; Yu, Rong ^[1]; Liu, J. -M. ^[2]; Dagotto, Elbio R ^[1]

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1. ORNL
2. Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing

The phase diagram of quarter-hole-doped perovskite manganites is investigated using the doubleexchange model. An exotic striped type-II multiferroic phase, where 25% of the nearest-neighbor spin couplings are orthogonal to each other, is found in the narrow-bandwidth region. Comparing with the spiral-spin ordering phase of undoped manganites, the multiferroic Curie temperature of the new phase is estimated to be 4 times higher, while the ferroelectric polarization is similar in magnitude. Our study provides a path for noncollinear spin multiferroics based on electronic self-organization, different from the traditional approach based on superexchange frustration.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 971240
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 10 Vol. 103; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CURIE POINT
PEROVSKITE
PHASE DIAGRAMS
PHYSICS
POLARIZATION
SPIN