Enhanced magnetism-generated ferroelectricity in highly frustrated Fe-doped Ho{sub 2}Ti{sub 2}O{sub 7}

Journal Article · Thu May 07 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4918334· OSTI ID:22410113

Lin, L. ^[1]; Xie, Y. L.; Zhao, Z. Y.; Yan, Z. B.; Wen, J. J. ^[2]

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1. Department of Physics, Southeast University, Nanjing 211189 (China)
2. Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218 (United States)

We present careful experiments on the ferroelectric (FE), dielectric, and magnetic behaviors of Ho{sub 2−x}Fe{sub x}Ti{sub 2}O{sub 7} with Fe{sup 3+} substitution for Ho{sup 3+}. A remarkable enhancement of polarization up to 235 μC/m{sup 2} is obtained at a low level x = 0.08, accompanied with the FE transition up to ∼80 K. The ac susceptibility under magnetic fields shows an expected saturated maximum in the real part χ′, along with an unexpected frequency-dependent peak in the imaginary part χ″, indicating unusual slow spin relaxation. The coupled correlated spin domains through dipolar interaction are argued to give rise to nonzero electric-dipole via Dzyaloshinskii-Moriya interaction.

• OSTI ID: 22410113
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 17; Other Information: (c) 2015 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
CONCENTRATION RATIO
DOPED MATERIALS
ELECTRIC DIPOLES
FERROELECTRIC MATERIALS
FREQUENCY DEPENDENCE
HOLMIUM COMPOUNDS
HOLMIUM IONS
IRON COMPOUNDS
IRON IONS
MAGNETIC FIELDS
MAGNETISM
PHASE TRANSFORMATIONS
POLARIZATION
RELAXATION
SPIN
TEMPERATURE DEPENDENCE
TITANATES