Journal
PHYSICAL REVIEW B
Volume 78, Issue 19, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.78.193101
Keywords
antiferromagnetic materials; dielectric polarisation; ferroelectric materials; frustration; iron compounds; magnetic structure; magnetic switching; magnetoelectric effects; manganese compounds; multiferroics; neutron diffraction
Funding
- Office of Basic Energy Sciences
- U.S. Department of Energy
- National Science Foundation [DMR-0454672]
- T.L.L. Temple Foundation
- J.J. and R. Moores Endowment
- U.S. Air Force Office of Scientific Research
- State of Texas through TCSUH
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Elastic neutron scattering is used to study the spin correlations in the multiferroic Mn1-xFexWO4 with x=0.035, 0.05, and 0.10. The noncollinear incommensurate (ICM) magnetic structure associated with the ferroelectric (FE) phase in pure MnWO4 is suppressed at x=0.035 and completely absent at x=0.10. The ICM spin order and FE phase can be restored by applying a magnetic field along the spin easy axis. The low-T commensurate magnetic structure extends in both H/T with increasing Fe concentration. The systematic evolution of the magnetic and electric properties indicates that the noncollinear ICM spin order results from competing magnetic interactions and its stabilization can be tuned by the internal (x) or external (magnetic-field) perturbations.
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