Effect of the electric field on “incommensurate-commensurate” magnetic phase transitions in BiFeO3-type multiferroics

Zhdanov, A. G.; Zvezdin, A. K.; Pyatakov, A. P.; Kosykh, T.B.; Viehland, Dwight

doi:10.1134/s1063783406010185

Cited by 21 publications

(21 citation statements)

References 12 publications

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“…As for the homogeneous state l ||  c (θ=0), it was shown in [50] that the parallel phase is only possible under electric fields applied antiparallel to P s , which are much larger than the ferroelectric coercive field of BiFeO 3 ; and thus unlikely to exist for this particular material.…”

Section: Theory Of Magnetic and Electric Field-induced Phase Transitionsmentioning

confidence: 99%

“…is an elliptical integral of the first kind, and m the modulus parameter of the elliptical integral that is found by minimization procedure of the free-energy (10) [50]. For an anisotropy constant much smaller than the exchange energy 2 u K Aq << , the modulus parameter m tends to zero, and solution (14a) becomes harmonic with a linear dependence of θ on coordinates (13).…”

Section: Spatially Modulated Spin Structurementioning

confidence: 99%

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Phase transitions in multiferroic BiFeO₃crystals, thin-layers, and ceramics: enduring potential for a single phase, room-temperature magnetoelectric ‘holy grail’

et al. 2006

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Magnetic phase transitions in multiferroic bismuth ferrite (BiFeO3) induced by magnetic field, epitaxial strain, and composition modification are considered. These transitions from a spatially modulated spin spiral state to a homogenous antiferromagnetic one are accompanied by the release of latent magnetization and a linear magnetoelectric effect that makes BiFeO3-based materials efficient room-temperature single phase multiferroics.Since the beginning of the multiferroic era (in the early 1960s), after Soviet scientists discovered a new class of materials that was called "ferroelectromagnets" [1], to our present time, bismuth ferrite BiFeO 3 has remained the prototypical example of a multiferroic: having a relatively simple structure and at the same time quite diversified and uncommon properties.On the one hand due to its simple chemical and crystal structure, BiFeO 3 is a model system for fundamental and theoretical studies of multiferroics [2]. However, on the other hand, its unusual magnetic symmetry properties (space and time symmetry violation both in its crystal and magnetic structures) results in a variety of nontrivial consequences, including: (i) the unique coexistence of weak ferromagnetism and linear magnetoelectricity [3,4]; (ii) a toroidal moment, i.e., a special magnetic type of ordering [5][6][7][8]; (iii) the existence of an incommensurately modulated spin structure [9], previously only observed in magnetic metals; and (iv) magnetically induced optical second harmonic generation, observed for the first time in this particular material [10]. Furthermore, BiFeO 3 is the material with unique high ferroelectric Curie (T C =1083 K) [11] and antiferromagnetic Neel (T N =643K) [12] temperatures. However, its potential has yet to be realized, and might never be fully exploited. Difficulties persist as the magnetoelectric exchange and weak ferromagnetism are locked within a spin cycloid. A fundamental problem is that electronic configurations that favor magnetism are antagonistic to those that favor polarization [2] -compromise is necessary. Recently, investigations have shown that the multiferroic properties of BiFeO 3 can be dramatically increased by (i) epitaxial constraint [13], and/or (ii) rare earth substituents. These findings coupled with those in ME two-phase (nano and macro) composites of piezoelectric and magnetostrictive materials have served as triggers for a "magnetoelectric renaissance": the revival of hope to find a room temperature magnetoelectric material with significant coupling of polar and magnetic subsystems [14][15][16]. As a consequence, multiferroics are now being considered as promising materials for spintronics [17,18], magnetic memory systems, sensors, and tunable microwave devices [19]: offering the potential to revolutionize electromagnetic material's applications.

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Section: Theory Of Magnetic and Electric Field-induced Phase Transitionsmentioning

confidence: 99%

Section: Spatially Modulated Spin Structurementioning

confidence: 99%

Phase transitions in multiferroic BiFeO₃crystals, thin-layers, and ceramics: enduring potential for a single phase, room-temperature magnetoelectric ‘holy grail’

et al. 2006

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“…In some types of multiferroics such as bismuth ferrite BiFeO 3 the long-range spatially modulated spin structure incommensurate to the crystal lattice period exists (spin cycloid) [8]. This magnetic structure related to the term in free energy that is very similar to the inhomogenous magnetoelectric coupling (1)…”

Section: Transformation Of Spin Cycloid In Electric Fieldmentioning

confidence: 99%

“…The period of the cycloid depends on K eff [3] thus providing electric field control of spin cycloid structure. The dependence of spin cycloid shape on electric field calculated by numerical minimization procedure [8] for free energy (6) is shown in Fig. 2.…”

Section: Transformation Of Spin Cycloid In Electric Fieldmentioning

confidence: 99%

Electric field control of micromagnetic structure

Логгинов

Мешков

Николаев

et al. 2007

Journal of Magnetism and Magnetic Materials

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“…For example, ceramic materials based on one of the initial components of the Bi 4 Ti 3 O 12 -BiFeO 3 system, namely, bismuth titanate Bi 4 Ti 3 O 12 , have been actively used in various optical and acoustical systems [13], including those operating at high temperatures. The other component of the Bi 4 Ti 3 O 12 -BiFeO 3 system, namely, bismuth ferrite BiFeO 3 , exhibits properties characteristic of multiferroics at temperatures above room temperature (up to 370 ° C) [15] and, consequently, has currently been applied to the design of magnetoelectric materials. It should be noted that the Fujitsu Microelectronics Company has recently begun to design a material for use in a new generation of ferromagnetic memory devices.…”

Section: Introductionmentioning

confidence: 99%

Thermal behavior of layered perovskite-like compounds in the Bi4Ti3O12-BiFeO3 system

2007

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The thermal properties of compounds of the general formula Bi m + 1 Fe m -3 Ti 3 O 3 m + 3 , which are layered perovskite-like phases of the Aurivillius type, are investigated as a function of their composition. It is demonstrated that the temperature of decomposition of the Bi m + 1 Fe m -3 Ti 3 O 3 m + 3 compounds decreases with an increase in the thickness of perovskite-like layers alternating in the structure and that the composition dependence of the temperature of the structural transition observed in these compounds exhibits a more complex behavior. The linear thermal expansion coefficients of all the compounds under investigation are found to be virtually independent of the composition.

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Effect of the electric field on “incommensurate-commensurate” magnetic phase transitions in BiFeO3-type multiferroics

Cited by 21 publications

References 12 publications

Phase transitions in multiferroic BiFeO₃crystals, thin-layers, and ceramics: enduring potential for a single phase, room-temperature magnetoelectric ‘holy grail’

Phase transitions in multiferroic BiFeO₃crystals, thin-layers, and ceramics: enduring potential for a single phase, room-temperature magnetoelectric ‘holy grail’

Electric field control of micromagnetic structure

Thermal behavior of layered perovskite-like compounds in the Bi4Ti3O12-BiFeO3 system

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Effect of the electric field on “incommensurate-commensurate” magnetic phase transitions in BiFeO3-type multiferroics

Cited by 21 publications

References 12 publications

Phase transitions in multiferroic BiFeO3crystals, thin-layers, and ceramics: enduring potential for a single phase, room-temperature magnetoelectric ‘holy grail’

Phase transitions in multiferroic BiFeO3crystals, thin-layers, and ceramics: enduring potential for a single phase, room-temperature magnetoelectric ‘holy grail’

Electric field control of micromagnetic structure

Thermal behavior of layered perovskite-like compounds in the Bi4Ti3O12-BiFeO3 system

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Phase transitions in multiferroic BiFeO₃crystals, thin-layers, and ceramics: enduring potential for a single phase, room-temperature magnetoelectric ‘holy grail’

Phase transitions in multiferroic BiFeO₃crystals, thin-layers, and ceramics: enduring potential for a single phase, room-temperature magnetoelectric ‘holy grail’