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Kadlec, F.; Kadlec, Christelle; Vít, Jakub; Borodavka, Fedir; Kempa, M.; Prokleška, Ján; Buršík, J.; Uhrecký, Róbert; Rols, S.; Chai, Yisheng; Zhai, Kun; Sun, Young; Drahokoupil, Jan; Goian, Veronica; Kamba, S.

doi:10.1103/physrevb.94.024419

Cited by 28 publications

(8 citation statements)

References 31 publications

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“…Subsequently, many attempts were made to modify the magnetic and dipole properties, and create a fully-fledged single-phase multiferroic material based on hexagonal ferrites. To date, modifications are known for magnetic sublattices substituted with magnetic and nonmagnetic atoms (Kumar et al, 2017(Kumar et al, , 2018Trukhanov et al, 2018;Kang & Moon, 2015;Tokunaga et al, 2010;Kreisel et al, 2001;Pieper et al, 2002;Mariñ o-Castellanos et al, 2004;Kadlec et al, 2016;Dixit et al, 2019;Ghzaiel et al, 2016;Zhukova et al, 2016;Alyabyeva et al, 2019Alyabyeva et al, , 2020. This substitution leads to changes in the absolute value of the magnetic susceptibility, the magnetic structure and the appearance, and to an improvement in the ME properties (Kimura, 2012;Chai et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Ferromagnetoelectric phases of hexaferrites: a group-theoretical analysis

Широков¹,

Razumnaya²,

Mikheykin³

2021

Acta Crystallogr Sect B

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A symmetry-guided approach for designing and tailoring magnetoelectric and multiferroic hexaferrites is proposed. A group-theoretical study of the magnetoferroelectric structures of a hexagonal ferrite was carried out. The results were applied to M-, W- and Z-type hexaferrites. It is shown that the magnetic structure cannot be collinear in the main magnetic phase, with the direction of the magnetic moment along the hexagonal axis. Magnetic sublattices are shown in which cation substitution should lead to the formation of a multiferroic state. A thermodynamic model of a hexagonal ferroelectric ferrimagnet was constructed, in which isostructural phase transitions were observed.

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Section: Introductionmentioning

confidence: 99%

Ferromagnetoelectric phases of hexaferrites: a group-theoretical analysis

Широков¹,

Razumnaya²,

Mikheykin³

2021

Acta Crystallogr Sect B

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“…To find out whether some magnetic excitation can be at the origin of the discovered THz soft mode, similar to Y-and Z-type hexaferrites 33,34 , we performed THz spectral measurements cm -1 at room temperature to ≈10 cm -1 at 10 K, see Fig. 4d.…”

Section: Thz Spectra the Soft Modementioning

confidence: 99%

Lead-substituted barium hexaferrite for tunable terahertz optoelectronics

Alyabyeva

Prokhorov

Винник

et al. 2021

Preprint

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In recent years, due to their outstanding dielectric and magnetic properties, hexagonal ferrites (hexaferrites) have attracted considerable interest for developing electronic components of next-generation communication systems. The complex crystal structure of hexaferrites and critical dependences of their electric and magnetic properties on external factors, like magnetic or electric fields, pressure or doping, open ample opportunities for targeted tuning of these properties when designing specific devices. To that end, we explored the electromagnetic properties of the Pb-substituted barium hexaferrite, Ba1-xPbxFe12O19, a compound featuring an extremely rich set of physical phenomena that are inherent in the dielectric and magnetic subsystems of the material and are expected to have significant effect on its electromagnetic response at radio and terahertz frequencies. We performed the first detailed measurements of the AC response of single-crystalline Ba1-xPbxFe12O19 in an extremely broad spectral range from 1 Hz to 240 THz down to temperatures as low as 5 K. We fully characterized numerous microscopic phenomena that determine the broad-band dielectric response of the compound, and we analyzed their nature. This includes temperature-activated radiofrequency relaxations that were attributed to the dynamic response of magnetic/dielectric domains. The terahertz response is dominated by a ferroelectric-like soft mode with an unusual temperature behavior that we explain by means of a microscopic model. Several narrower terahertz excitations are associated with electronic transitions between the fine-structure components of the Fe2+ground state. Narrow resonances detected in the gigahertz region are presumably of magneto-electric origin. The obtained data on diverse but controllable electromagnetic properties of Ba1-xPbxFe12O19 compounds provides the researchers with information that makes the entire class of hexaferrites materials attractive for manufacturing electronic devices for the radiofrequency and terahertz ranges, such as absorbing coatings, anti-reflective coatings, absorbers, electromagnetic shields, antennas, phase shifters, filters, resonators, modulators, etc.

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“…Hexaferrite compounds investigated here are promising materials hosting the strong ME coupling driven by the helical spin structures in a wide temperature range including room temperature [12,[21][22][23]. The electromagnon resonance has been reported for the helical spin phases of Y-and Z-type hexaferrites at lower temperatures [24][25][26]. These electromagnon resonances have been ascribed to the ES mechanism, because the light polarization to excite the electromagnon resonance is always parallel to the crystallographic c axis irrespective of the detail of the helical spin structures.…”

Section: Introductionmentioning

confidence: 96%

Electromagnon Resonance at Room Temperature with Gigantic Magnetochromism

et al. 2018

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Elementary excitation characteristic of the magnetoelectric (ME) multiferroics is a magnon endowed with the electric activity, which is referred to as electromagnon. The electromagnon resonance mediated by the bilinear exchange coupling potentially exhibits the strong terahertz light-matter interaction with novel optical properties different from the conventional magnon excitation. Here we report the robust electromagnon resonance on the helimagnetic Y-type hexaferrites in a wide temperature range including room temperature. Furthermore, the efficient magnetic-field controls of the electromagnon are demonstrated on the flexible spin structure of these compounds, leading to the generation/annihilation of the resonance as well as the large resonance energy shift. These terahertz characteristics of the electromagnon exemplify the versatile magneto-optical functionality driven by the ME coupling in the multiferroics, paving a way for possible terahertz applications as well as terahertz control of a magnetic state of matter.

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Electromagnon in theZ-type hexaferrite(BaxSr1−x)3Co2

Cited by 28 publications

References 31 publications

Ferromagnetoelectric phases of hexaferrites: a group-theoretical analysis

Ferromagnetoelectric phases of hexaferrites: a group-theoretical analysis

Lead-substituted barium hexaferrite for tunable terahertz optoelectronics

Electromagnon Resonance at Room Temperature with Gigantic Magnetochromism

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