μSR study of Eu0.8Ce0.2Mn2O5 and EuMn2O5 multiferroics

Vorob’ev, S. I.; Andrievskii, D. S.; Barsov, S.; Getalov, A. L.; Головенчиц, Е. И.; Komarov, E. N.; Kotov, S.; Mishchenko, A. Yu.; Санина, В. А.; Shcherbakov, G. V.

doi:10.1134/s1063776116130215

Cited by 8 publications

(5 citation statements)

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“…We studied the phase separation states in RMn 2 O 5 multiferroics and in doped R 0.8 Ce 0.2 Mn 2 O 5 (R = Eu, Gd, Bi, Er, Tb) also [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ]. Note that RMn 2 O 5 and doped R 0.8 Ce 0.2 Mn 2 O 5 crystals have the same Pbam central symmetry.…”

Section: Introductionmentioning

confidence: 99%

“…Note that RMn 2 O 5 and doped R 0.8 Ce 0.2 Mn 2 O 5 crystals have the same Pbam central symmetry. Investigations of dielectric and magnetic properties, heat capacity, X-ray diffraction, Raman light scattering [ 10 , 11 , 12 , 13 , 14 , 15 ], electric polarization [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ], and µSR studies [ 23 , 24 ] were carried out.…”

Section: Introductionmentioning

confidence: 99%

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Optical Control of Superlattices States Formed Due to Electronic Phase Separation in Multiferroic Eu0.8Ce0.2Mn2O5

2021

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The effect of optical pumping and magnetic field on properties of the electronic phase separation regions, which are the multiferroic semiconductor heterostructures in the form of superlattices, have been studied in Eu0.8Ce0.2Mn2O5. These superlattices are formed due to self-organization in a dielectric crystal matrix as a result of the competing internal interactions balance and occupy a small crystal volume. The dynamical equilibrium states of superlattices are initially formed during cycling of as-grown samples in a magnetic field. The superlattices in such states are ferromagnetic and electrically neutral. Sets of ferromagnetic resonances were observed from individual layers of superlattices. Their features give rise information on properties of these layers and of a superlattice as a whole. The differences in the parameters of these resonances were due to different distributions of Mn3+ and Mn4+ ions in individual superlattices layers. It has been found that optical pumping having different powers allows us to control of multiferroic properties of superlattices layers by changing their magnetic and electric properties. It is shown that, under certain conditions, it is possible to significantly increase the temperatures at which multiferroic heterostructures exist.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optical Control of Superlattices States Formed Due to Electronic Phase Separation in Multiferroic Eu0.8Ce0.2Mn2O5

2021

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“…A strong magnetoelectric interaction in phase separation regions may persist up to high temperatures. The states of phase separation regions were studied in RMn 2 O 5 multiferroics and in doped R 0.8 Ce 0.2 Mn 2 O 5 (R = Eu, Gd, Tb, Bi) [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. These papers were focused on the dielectric and magnetic properties, heat capacity, X-ray diffraction, Raman scattering [7][8][9][10][11][12][13], electric polarization [14][15][16][17][18][19], and µSR studies [20,21].…”

Section: Introductionmentioning

confidence: 99%

“…The states of phase separation regions were studied in RMn 2 O 5 multiferroics and in doped R 0.8 Ce 0.2 Mn 2 O 5 (R = Eu, Gd, Tb, Bi) [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. These papers were focused on the dielectric and magnetic properties, heat capacity, X-ray diffraction, Raman scattering [7][8][9][10][11][12][13], electric polarization [14][15][16][17][18][19], and µSR studies [20,21]. Note that the matrices of RMn 2 O 5 crystals and doped R 0.8 Ce 0.2 Mn 2 O 5 crystals had the same central symmetry Pbam.…”

Section: Introductionmentioning

confidence: 99%

Phase transitions and phase transformations in the phase separation nanoregions in ErMn-=SUB=-2-=/SUB=-O-=SUB=-5-=/SUB=- multiferroics

B.Kh.

V.A.

E.I.

et al. 2022

Physics of the Solid State

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The effect of the rare-earth ion Er3+, which has a large orbital contribution to the magnetic moment, were studied to phase transitions and phase transformations of 2D nanoregions of phase separation in the ErMn2O5 multiferroic. These nanoregions are the semiconductor heterostructures (superlattices) and are formed due to self-organization processes in the ErMn2O5 matrix. Significant effect of Er3+ ions, the moments of which are rigidly oriented along the c axis of the crystal, on the magnetic dynamics, heat capacity and multiferroic properties of layers superlattises was found at a wide temperature range 5-300 K in ErMn2O5 multiferroics. Keywords: multiferroic, 2D phase separation nanoregions, semiconductor-heterostructures, superlattices, phase transitions, phase transformations.

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“…In fact, it was reported in 2015 that the lattice structure of RMn 2 O 5 family at ambient temperature may belong to the non-centrosymmetric Pm space group rather than the centrosymmetric Pbam. [36] This work has caught attention in the past three years, [35,[37][38][39][40][41][42][43][44][45] and some doubtable ferroelectric loops in the high-T range were measured. [46,47] While this dispute has not been settled, the possibility of polar lattice structure in the high-T range may allow an opportunity to correlate the data scattering of the low-T multiferroicity with the high-T polarized state induced by electric poling or other stimuli.…”

Section: Introductionmentioning

confidence: 99%

Unusual tunability of multiferroicity in GdMn ₂ O ₅ by electric field poling far above multiferroic ordering point

Zheng

Tian

et al. 2019

Chinese Phys. B

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The multiferroicity in the RMn 2 O 5 family remains unclear, and less attention has been paid to its dependence on high-temperature (high-T ) polarized configuration. Moreover, no consensus on the high-T space group symmetry has been reached so far. In view of this consideration, one may argue that the multiferroicity of RMn 2 O 5 in the low-T range depends on the poling sequence starting far above the multiferroic ordering temperature. In this work, we investigate in detail the variation of magnetically induced electric polarization in GdMn 2 O 5 and its dependence on electric field poling routine in the high-T range. It is revealed that the multiferroicity does exhibit qualitatively different behaviors if the high-T poling routine changes, indicating the close correlation with the possible high-T polarized state. These emergent phenomena may be qualitatively explained by the co-existence of two low-T polarization components, a scenario that was proposed earlier.One is the component associated with the Mn 3+ -Mn 4+ -Mn 3+ exchange striction that seems to be tightly clamped by the high-T polarized state, and the other is the component associated with the Gd 3+ -Mn 4+ -Gd 3+ exchange striction that is free of the clamping. The present findings may offer a different scheme for the electric control of the multiferroicity in RMn 2 O 5 .

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μSR study of Eu0.8Ce0.2Mn2O5 and EuMn2O5 multiferroics

Cited by 8 publications

References 9 publications

Optical Control of Superlattices States Formed Due to Electronic Phase Separation in Multiferroic Eu0.8Ce0.2Mn2O5

Optical Control of Superlattices States Formed Due to Electronic Phase Separation in Multiferroic Eu0.8Ce0.2Mn2O5

Phase transitions and phase transformations in the phase separation nanoregions in ErMn-=SUB=-2-=/SUB=-O-=SUB=-5-=/SUB=- multiferroics

Unusual tunability of multiferroicity in GdMn ₂ O ₅ by electric field poling far above multiferroic ordering point

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μSR study of Eu0.8Ce0.2Mn2O5 and EuMn2O5 multiferroics

Cited by 8 publications

References 9 publications

Optical Control of Superlattices States Formed Due to Electronic Phase Separation in Multiferroic Eu0.8Ce0.2Mn2O5

Optical Control of Superlattices States Formed Due to Electronic Phase Separation in Multiferroic Eu0.8Ce0.2Mn2O5

Phase transitions and phase transformations in the phase separation nanoregions in ErMn-=SUB=-2-=/SUB=-O-=SUB=-5-=/SUB=- multiferroics

Unusual tunability of multiferroicity in GdMn 2 O 5 by electric field poling far above multiferroic ordering point

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Unusual tunability of multiferroicity in GdMn ₂ O ₅ by electric field poling far above multiferroic ordering point