Publisher’s Note: Stability of spin-driven ferroelectricity in the thin-film limit: Coupling of magnetic and electric order in multiferroic TbMnO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>films [Phys. Rev. B<b>88</b>, 054401 (2013)]

Glavic, Artur; Becher, Carsten; Voigt, Jörg; Schierle, E.; Weschke, E.; Fiebig, Manfred; Brückel, Thomas

doi:10.1103/physrevb.88.059904

Cited by 7 publications

(11 citation statements)

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“…In this case, the detection limit of our apparatus was about 2 orders of magnitude below the BaTiO 3 film signal. We note that the SHG technique was able to detect broken space symmetry even in 6 nm thin TbMnO 3 film, where the spin‐induced (i.e., improper) ferroelectric polarization is 500‐times smaller than in BaTiO 3 . The absence of SHG signal in our experiments does not support acentric ferroelectric structure of our a‐TiO 2 thin films.…”

Section: Resultsmentioning

confidence: 82%

“…X‐ray diffraction measurements of the c ‐lattice parameter did not reveal any anomaly up to 620 K, typical for a structural phase transition. Moreover, room‐temperature SHG measurements did not reveal any signal typical for broken inversion symmetry, although the SHG method is in principle sensitive on a small inversion‐symmetry breaking even in spin‐induced (i.e., improper) ferroelectric TbMnO 3 thin films (thickness 6 nm) with polarization 500‐times smaller than in BaTiO 3 .…”

Section: Discussionmentioning

confidence: 92%

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Comment on “Interesting Evidence for Template‐Induced Ferroelectric Behavior in Ultra‐Thin Titanium Dioxide Films Grown on (110) Neodymium Gallium Oxide Substrates”

Skiadopoulou

Kamba

Drahokoupil

et al. 2015

Adv Funct Materials

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Very recently there was a report of the discovery using piezoelectric force microscopy (PFM) of a switchable ferroelectric polarization in 1.6 % tensile strained TiO 2 thin film with anatase crystal structure (see N. Deepak et al. Adv. Funct. Mater. 2014, 24, 2844. The polarization disappeared only above 450 K, which was assigned as a Curie temperature, T C . Here we have performed X-ray diffraction, second-harmonic generation (SHG) and infrared investigations of the same films. Phonon frequencies exhibit less than a 10 % shift down with the tensile strain and no anomaly near expected T C . SHG experiment did not reveal any signal characteristic for inversion symmetry breaking, as expected in ferroelectric phase, and the clattice parameter exhibits no anomaly on heating near expected T C . Based on these results, we can summarize that we were not able to confirm the previously discovered ferroelectricity in tensile-strained anatase-TiO 2 thin films.2

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Section: Resultsmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 92%

Comment on “Interesting Evidence for Template‐Induced Ferroelectric Behavior in Ultra‐Thin Titanium Dioxide Films Grown on (110) Neodymium Gallium Oxide Substrates”

Skiadopoulou

Kamba

Drahokoupil

et al. 2015

Adv Funct Materials

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“…Indeed, effects of magnetoelectric coupling (ME) are evident in the dynamical response to moderate E [37][38][39][40][41][42], i.e., phenomena rooted in ME can be driven, and possibly controlled, by moderate external fields. It is noteworthy that the chiral behavior of TbMnO 3 persists with miniaturization down to 6 nm [31]. Furthermore, the feasibility was demonstrated of a multiferroic spin- 1 2 chain of LiCu 2 O 2 [43] and field-switchable LiCuVO 4 [44].…”

Section: Introductionmentioning

confidence: 97%

“…This allows us to steer, for instance, magnetic order with moderate electric fields opening thus the door for magnetoelectric spintronics and spin-based information processing with ultra low power consumption and dissipation [10,[23][24][25]. These prospects are fueled by advances in synthesis and nanofabrication which renders feasible versatile MF nano-and quantum structures with enhanced multiferroic coupling [2][3][4][5][6]31]. From a fundamental point of view MF are also fascinating as their properties often emerge from an interplay of competing exchange and electronic correlation, crystal symmetry, and coupled spin-charge dynamics.…”

Section: Introductionmentioning

confidence: 99%

Helical multiferroics for electric field controlled quantum information processing

et al. 2014

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Magnetoelectric coupling in helical multiferroics allows us to steer spin order with electric fields. Here we show theoretically that in a helical multiferroic chain quantum information processing as well as quantum phases are highly sensitive to electric (E) field. Applying E field, the quantum state transfer fidelity can be increased and made directionally dependent. We also show that E field transforms the spin-density-wave/nematic or multipolar phases of a frustrated ferromagnetic spin-1 2 chain in chiral phase with a strong magnetoelectric coupling. We find sharp reorganization of the entanglement spectrum as well as a large enhancement of fidelity susceptibility at Ising quantum phase transition from nematic to chiral states driven by electric field. These findings point to a tool for quantum information with low power consumption.

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“…[1][2][3][4][5]. However, very few single-phase materials exhibit multiferroic properties due to the mutual exclusion of ferroelectricity and magnetism.…”

Section: Introductionmentioning

confidence: 99%

Enhanced magnetic and ferroelectric properties in Cr doped Bi2Fe4O9 ceramics

Qiu

Zou

Sang

et al. 2014

J Mater Sci: Mater Electron

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Single phase Bi 2 Fe 4(1-x) Cr 4x O 9 (0 B x B 0.08) ceramics are prepared by a modified Pechini method to investigate the effect of Cr doping on magnetic and ferroelectric properties. The results show that both the magnetic and ferroelectric properties are strongly dependent on Cr doping. With the introduction of Cr ions, Bi 2 Fe 4 O 9 ceramics change from antiferromagnetism to weak FM at room temperature, in accompaniment with the enhancement of ferroelectric properties. The remnant magnetization and polarization enhance monotonically from 0.014 emu/g and 0.103 lC/cm 2 for x = 0.02 sample to 0.025 emu/g and 0.53 lC/cm 2 for x = 0.08 sample, respectively. The improvement of magnetic and ferroelectric properties should be mainly related to the suppression of inhomogeneous magnetic spin structure and the reduction of electric leakage by Cr doping. These results suggest that Cr doping can adjust the magnetic and ferroelectric properties of Bi 2 Fe 4 O 9 ceramics, which is a promising candidate for room temperature multiferroics.

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Publisher’s Note: Stability of spin-driven ferroelectricity in the thin-film limit: Coupling of magnetic and electric order in multiferroic TbMnO3films [Phys. Rev. B88, 054401 (2013)]

Cited by 7 publications

References 0 publications

Comment on “Interesting Evidence for Template‐Induced Ferroelectric Behavior in Ultra‐Thin Titanium Dioxide Films Grown on (110) Neodymium Gallium Oxide Substrates”

Comment on “Interesting Evidence for Template‐Induced Ferroelectric Behavior in Ultra‐Thin Titanium Dioxide Films Grown on (110) Neodymium Gallium Oxide Substrates”

Helical multiferroics for electric field controlled quantum information processing

Enhanced magnetic and ferroelectric properties in Cr doped Bi2Fe4O9 ceramics

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