Terahertz ferroelectric soft mode in weakly doped SrTiO3: M thin films (M=Mn, Ni, Fe, Co)

Zhukova, E.S.; Nekrasov, B.M.; Tyunina, M.; Vetokhina, V.; Kocourek, T.; de Prado, E.; Stolyarov, V.S.; Frolov, A.S.; Melentev, A.V.; Savinov, M.; Bush, A.A.; Kozlov, V.I.; Talanov, M.V.; Gorshunov, B.P.

doi:10.1016/j.jallcom.2023.173255

Journal of Alloys and Compounds

2024

DOI: 10.1016/j.jallcom.2023.173255

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Terahertz ferroelectric soft mode in weakly doped SrTiO3: M thin films (M=Mn, Ni, Fe, Co)

E.S. Zhukova,

B.M. Nekrasov,

M. Tyunina

et al.

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2024

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Soft Mode Behavior in Transition Metal Doped SrTiO3 Thin Films on MgO Substrates

Melentev,

Zhukova,

Nekrasov

et al. 2024

Jetp Lett.

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The ferroelectric soft mode in polycrystalline pristine SrTiO3 and weakly doped SrTiO3 : M (M = 2 at% Fe, Ni, Mn, Co) thin films on (001) MgO substrates has been studied using time-domain terahertz spectroscopy. Spectra of real and imaginary parts of film permittivity were determined in the frequency range of 5–100 cm–1 at temperatures between 5 and 300 K. Central frequency and dielectric contribution of the ferroelectric soft mode show Barrett-like temperature dependencies similar to crystalline SrTiO3. Large negative values of Curie temperature and enhanced positive values of Barrett quantum temperatures are discovered indicating that doped SrTiO3 thin films are farther from ferroelectric phase transition than SrTiO3 crystals.

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Soft Mode Behavior in Transition Metal Doped SrTiO3 Thin Films on MgO Substrates

Melentev,

Zhukova,

Nekrasov

et al. 2024

Jetp Lett.

View full text Add to dashboard Cite

show abstract

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Terahertz ferroelectric soft mode in weakly doped SrTiO3: M thin films (M=Mn, Ni, Fe, Co)

Cited by 1 publication

References 72 publications

Soft Mode Behavior in Transition Metal Doped SrTiO3 Thin Films on MgO Substrates

Soft Mode Behavior in Transition Metal Doped SrTiO3 Thin Films on MgO Substrates

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