Multiferroicity and skyrmions carrying electric polarization in GaV
            <sub>4</sub>
            S
            <sub>8</sub>

Ruff, E.; Widmann, S.; Lunkenheimer, P.; Tsurkan, V.; Bordács, S.; Kézsmárki, I.; Loidl, A.

doi:10.1126/sciadv.1500916

Cited by 173 publications

(275 citation statements)

References 60 publications

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“…1. The transition from a magnetically ordered to the paramagnetic phase is observed as a peak in the magnetization and indicated by a vertical line [40]. While the transition is observed at T c = 12.5 for GaV 4 [7,41,42], we see an increase in χ in the region of the phase diagram where the SkL phase has been observed [15].…”

Section: Magnetization Measurementsmentioning

confidence: 78%

Magnetic phases of skyrmion-hostingGaV4S8−ySey(y=0,2
Franke
¹
,
Huddart
²
,
Hicken
³

et al. 2018
Phys. Rev. B
30
2
32
3
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Citation for published item:prnkeD u¡ evin tF eF nd ruddrtD fenjmin wF nd rikenD homs tF nd ioD pn nd flundellD tephen tF nd rttD prnis vF nd grisntiD wrt nd frkerD toel eF F nd glrkD tewrt tF nd § tefn § i § D ele § s nd rtnenD woni giomg nd flkrishnnD qeeth nd vnsterD om @PHIVA 9wgneti phses of skyrmionEhosting qRVyey @y a HD PD RD VA proed with muon spetrosopyF9D hysil review fFD WV @SAF HSRRPVF Further information on publisher's website: eprinted with permission from the emerin hysil oietyX prnkeD u¡ evin tF eFD ruddrtD fenjmin wFD rikenD homs tFD ioD pnD flundellD tephen tFD rttD prnis vFD grisntiD wrtD frkerD toel eF FD glrkD tewrt tFD § tefn § i § D ele § sD rtnenD woni giomgD flkrishnnD qeeth vnsterD om @PHIVAF wgneti phses of skyrmionEhosting qRVyey @y a HD PD RD VA proed with muon spetrosopyF hysil eview f WV@SAX HSRRPVF @PHIVA y the emerin hysil oietyF eders my viewD rowseD ndGor downlod mteril for temporry opying purposes onlyD provided these uses re for nonommeril personl purposesF ixept s provided y lwD this mteril my not e further reproduedD distriutedD trnsmittedD modi(edD dptedD performedD displyedD pulishedD or sold in whole or prtD without prior written permission from the emerin hysil oietyFAdditional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. We present the results of a muon-spin spectroscopy investigation of GaV 4 S 8−y Se y with y = 0, 2, 4, and 8. Zero-field measurements suggest that GaV 4 Se 8 and GaV 4 S 8 have distinct magnetic ground states, with the latter material showing an anomalous temperature dependence of the local magnetic field. It is not possible to evolve the magnetic state continuously between these two systems, with the intermediate y = 2 and 4 materials showing glassy magnetic behavior at low temperature. The skyrmion lattice (SkL) phase is evident in the y = 0 and 8 materials through an enhanced response of the muon-spin relaxation to the emergent dynamics that accompany the SkL. For our polycrystalline samples of GaV 4 Se 8 , this enhanced dynamic response is confined to a smaller region of the magnetic field-temperature phase diagram than the previous reports of the SkL in single crystals.

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Section: Magnetization Measurementsmentioning

confidence: 78%

Magnetic phases of skyrmion-hostingGaV4S8−ySey(y=0,2
Franke
¹
,
Huddart
²
,
Hicken
³

et al. 2018
Phys. Rev. B
30
2
32
3
View full text Add to dashboard Cite

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“…2 [20,25,29]. Red and blue stars display the location of the maxima in the real and imaginary parts of the ac susceptibility using a modulation frequency of 1 kHz.…”

Section: A Magnetic Phase Diagram Established By Static and Ac Suscementioning

confidence: 99%

“…The compound undergoes a cooperative Jahn-Teller distortion at T S = 42 K through the stretching of the lattice along one of the four cubic body diagonals reducing the crystal symmetry to polar rhombohedral, R3m [21][22][23][24]. As a result a sizable ferroelectric polarization develops along the rhombohedral axis [25,26]. The depolarization field is reduced by the formation of submicron-sized structural domains of the four possible rhombohedrally distorted variants with the different 111 -type rhombohedral axes [21], assembling into an alternating lamellar domain structure [27].…”

Section: Introductionmentioning

confidence: 99%

“…* butykai@mail.bme.hu Long-range magnetic ordering arises and thereby the compound becomes a type-I multiferroic at T C = 13 K [25,26,28,29]. The interplay of the symmetric exchange interaction and the antisymmetric Dzyaloshinskii-Moriya (DM) exchange interaction gives rise to a long-wavelength spin ordering.…”

Section: Introductionmentioning

confidence: 99%

“…The skyrmion lattice in GaV 4 S 8 was demonstrated to carry magnetoelectric polarization [25,29], offering possibilities of skyrmion manipulation with external electric fields.…”

Section: Introductionmentioning

confidence: 99%

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Relaxation dynamics of modulated magnetic phases in the skyrmion host GaV4S8 : An ac magnetic susceptibility study

et al. 2017

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We report on the slow magnetization dynamics observed upon the magnetic phase transitions of GaV 4 S 8 , a multiferroic compound featuring a long-ranged cycloidal magnetic order and a Néel-type skyrmion lattice in a relatively broad temperature range below its Curie temperature. The fundamental difference between GaV 4 S 8 and the chiral helimagnets, the prototypical skyrmion host compounds, lies within the polar symmetry of GaV 4 S 8 , promoting a cycloidal instead of a helical magnetic order and rendering the magnetic phase diagram essentially different from that in the cubic helimagnets. Our ac magnetic susceptibility study reveals slow relaxation dynamics at the field-driven phase transitions between the cycloidal, skyrmion lattice and field-polarized states. At each phase boundary, the characteristic relaxation times were found to exhibit a strong temperature dependence, starting from the minute range at low temperatures, decreasing to the micro-to millisecond range at higher temperatures.

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Phase Selection in Mn–Si Alloys by Fast Solid‐State Reaction with Enhanced Skyrmion Stability

Xie

Yuan

et al. 2021

Adv Funct Materials

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B20‐type transition‐metal silicides or germanides are noncentrosymmetric materials hosting magnetic skyrmions, which are promising information carriers in spintronic devices. The prerequisite is to prepare thin films on technology‐relevant substrates with magnetic skyrmions stabilized at a broad temperature and magnetic‐field working window. A canonical example is the B20‐MnSi film grown on Si substrates. However, the as‐yet unavoidable contamination with MnSi1.7 occurs due to the lower nucleation temperature of this phase. In this work, a simple and efficient method to overcome this problem and prepare single‐phase MnSi films on Si substrates is reported. It is based on the millisecond reaction between metallic Mn and Si using flash‐lamp annealing (FLA). By controlling the FLA energy density, single‐phase MnSi or MnSi1.7 or their mixture can be grown at will. Compared with bulk MnSi, the prepared MnSi films show an increased Curie temperature of up to 41 K. In particular, the magnetic skyrmions are stable over a much wider temperature and magnetic‐field range than reported previously. The results constitute a novel phase selection approach for alloys and can help to enhance specific functional properties, such as the stability of magnetic skyrmions.

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Multiferroicity and skyrmions carrying electric polarization in GaV ₄ S ₈

Abstract: A zoo of multiferroic phases shows up in the lacunar spinel GaV4S8, including skyrmions carrying ferroelectric polarization.

Cited by 173 publications

References 60 publications

Magnetic phases of skyrmion-hostingGaV4S8−ySey(y=0,2
Franke
¹
,
Huddart
²
,
Hicken
³

et al. 2018
Phys. Rev. B
30
2
32
3
View full text Add to dashboard Cite

Magnetic phases of skyrmion-hostingGaV4S8−ySey(y=0,2
Franke
¹
,
Huddart
²
,
Hicken
³

et al. 2018
Phys. Rev. B
30
2
32
3
View full text Add to dashboard Cite

Relaxation dynamics of modulated magnetic phases in the skyrmion host GaV4S8 : An ac magnetic susceptibility study

Phase Selection in Mn–Si Alloys by Fast Solid‐State Reaction with Enhanced Skyrmion Stability

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Multiferroicity and skyrmions carrying electric polarization in GaV 4 S 8

Abstract: A zoo of multiferroic phases shows up in the lacunar spinel GaV4S8, including skyrmions carrying ferroelectric polarization.

Cited by 173 publications

References 60 publications

Magnetic phases of skyrmion-hostingGaV4S8−ySey(y=0,2Franke1, Huddart2, Hicken3 et al. 2018Phys. Rev. B302323View full textAdd to dashboardCite

Magnetic phases of skyrmion-hostingGaV4S8−ySey(y=0,2Franke1, Huddart2, Hicken3 et al. 2018Phys. Rev. B302323View full textAdd to dashboardCite

Relaxation dynamics of modulated magnetic phases in the skyrmion host GaV4S8 : An ac magnetic susceptibility study

Phase Selection in Mn–Si Alloys by Fast Solid‐State Reaction with Enhanced Skyrmion Stability

Contact Info

Product

Resources

About

Multiferroicity and skyrmions carrying electric polarization in GaV ₄ S ₈

Magnetic phases of skyrmion-hostingGaV4S8−ySey(y=0,2
Franke
¹
,
Huddart
²
,
Hicken
³

et al. 2018
Phys. Rev. B
30
2
32
3
View full text Add to dashboard Cite

Magnetic phases of skyrmion-hostingGaV4S8−ySey(y=0,2
Franke
¹
,
Huddart
²
,
Hicken
³

et al. 2018
Phys. Rev. B
30
2
32
3
View full text Add to dashboard Cite