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Dive into the research topics where Yana S. Glazkova is active.

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Featured researches published by Yana S. Glazkova.


Inorganic Chemistry | 2015

High-pressure synthesis, crystal structures, and properties of CdMn7O12 and SrMn7O12 perovskites.

Yana S. Glazkova; Noriki Terada; Yoshitaka Matsushita; Yoshio Katsuya; Masahiko Tanaka; A.V. Sobolev; Igor A. Presniakov; Alexei A. Belik

We synthesize CdMn7O12 and SrMn7-xFexO12 (x = 0, 0.08, and 0.5) perovskites under high pressure (6 GPa) and high temperature (1373-1573 K) conditions and investigate their structural, magnetic, dielectric, and ferroelectric properties. CdMn7O12 and SrMn7O12 are isostructural with CaMn7O12: space group R3̅ (No. 148), Z = 3, and lattice parameters a = 10.45508(2) Å and c = 6.33131(1) Å for CdMn7O12 and a = 10.49807(1) Å and c = 6.37985(1) Å for SrMn7O12 at 295 K. There is a structural phase transition at 493 K in CdMn7O12 and at 404 K in SrMn7O12 to a cubic structure (space group Im3̅), associated with charge ordering as found by the structural analysis and Mössbauer spectroscopy. SrMn6.5Fe0.5O12 crystallizes in space group Im3̅ at 295 K with a = 7.40766(2) Å and exhibits spin-glass magnetic properties below 34 K. There are two magnetic transitions in CdMn7O12 with the Néel temperatures TN2 = 33 K and TN1 = 88 K, and in SrMn7O12 with TN2 = 63 K and TN1 = 87 K. A field-induced transition is found in CdMn7O12 from about 65 kOe, and TN2 = 58 K at 90 kOe. No dielectric anomalies are found at TN1 and TN2 at 0 Oe in both compound, but CdMn7O12 exhibits small anomalies at TN1 and TN2 at 90 kOe. In pyroelectric current measurements, we observe large and broad peaks around magnetic phase transition temperatures in CdMn7O12, SrMn7O12, and SrMn6.5Fe0.5O12; we assign those peaks to extrinsic effects and compare our results with previously reported results on CaMn7O12. We also discuss general tendencies of the AMn7O12 perovskite family (A = Cd, Ca, Sr, and Pb).


Inorganic Chemistry | 2014

Perovskite-Structure TlMnO3: A New Manganite with New Properties

Wei Yi; Yu Kumagai; Nicola A. Spaldin; Yoshitaka Matsushita; Akira Sato; Igor A. Presniakov; A.V. Sobolev; Yana S. Glazkova; Alexei A. Belik

We synthesize a new member of the AMnO3 perovskite manganite family (where A is a trivalent cation)--thallium manganite, TlMnO3--under high-pressure (6 GPa) and high-temperature (1500 K) conditions and show that the structural and magnetic properties are distinct from those of all other AMnO3 manganites. The crystal structure of TlMnO3 is solved and refined using single-crystal X-ray diffraction data. We obtain a triclinically distorted structure with space group P1̅ (No. 2), Z = 4, and lattice parameters a = 5.4248(2) Å, b = 7.9403(2) Å, c = 5.28650(10) Å, α = 87.8200(10)°, β = 86.9440(10)°, and γ = 89.3130(10)° at 293 K. There are four crystallographic Mn sites in TlMnO3 forming two groups based on the degree of their Jahn-Teller distortions. Physical properties of insulating TlMnO3 are investigated with Mössbauer spectroscopy and resistivity, specific heat, and magnetization measurements. The orbital ordering, which persists to the decomposition temperature of 820 K, suggests A-type antiferromagnetic ordering with the ferromagnetic planes along the [-101] direction, consistent with the measured collinear antiferromagnetism below the Néel temperature of 92 K. Hybrid density functional calculations are consistent with the experimentally identified structure, insulating ground state, and suggested magnetism, and show that the low symmetry originates from the strongly Jahn-Teller distorted Mn(3+) ions combined with the strong covalency of the Tl(3+)-O bonds.


Inorganic Chemistry | 2016

Spin-Driven Multiferroic Properties of PbMn7O12 Perovskite

Alexei A. Belik; Yana S. Glazkova; Noriki Terada; Yoshitaka Matsushita; A.V. Sobolev; Igor A. Presniakov; Naohito Tsujii; Shigeki Nimori; Kanji Takehana; Y. Imanaka

We synthesize PbMn7O12 perovskite under high-pressure (6 GPa) and high-temperature (1373 K) conditions and investigate its structural, magnetic, dielectric, and ferroelectric properties. We find that PbMn7O12 exhibits rich physical properties from interplay among charge, orbital, and spin degrees of freedom and rich structural properties. PbMn7O12 crystallizes in space group R3̅ near room temperature and shows a structural phase transition at TCO = 397 K to a cubic structure in space group Im3̅; the Im3̅-to-R3̅ transition is associated with charge ordering. Below TOO = 294 K, a structural modulation transition associated with orbital ordering takes place. There are two magnetic transitions with Néel temperatures of TN1 = 83 K and TN2 = 77 K and probably a lock-in transition at TN3 = 43 K (on cooling). There is huge hysteresis on specific heat (between ∼37 and 65 K at 0 Oe), dielectric constant (between ∼20 and 70 K at 0 Oe), and dc and ac magnetic susceptibilities around the lock-in transition. Sharp dielectric constant, dielectric loss, and pyroelectric current anomalies are observed at TN2, indicating that electric polarization is developed at this magnetic transition, and PbMn7O12 perovskite is a spin-driven multiferroic. Polarization of PbMn7O12 is measured to be ∼4 μC/m(2). Field-induced transitions are detected at ∼63 and ∼170 kOe at 1.6-2 K; similar high-magnetic field properties are also found for CdMn7O12, CaMn7O12, and SrMn7O12. PbMn7O12 exhibits a quite small magnetodielectric effect, reaching approximately -1.3 to -1.7% at 10 K and 90 kOe.


Science and Technology of Advanced Materials | 2015

Structure and cation distribution in perovskites with small cations at the A site: the case of ScCoO3

Wei Yi; Igor A. Presniakov; A.V. Sobolev; Yana S. Glazkova; Yoshitaka Matsushita; Masahiko Tanaka; Kosuke Kosuda; Yoshihiro Tsujimoto; Kazunari Yamaura; Alexei A. Belik

Abstract We synthesize ScCoO3 perovskite and its solid solutions, ScCo1−xFexO3 and ScCo1−xCrxO3, under high pressure (6 GPa) and high temperature (1570 K) conditions. We find noticeable shifts from the stoichiometric compositions, expressed as (Sc1−xMx)MO3 with x = 0.05–0.11 and M = Co, (Co, Fe) and (Co, Cr). The crystal structure of (Sc0.95Co0.05)CoO3 is refined using synchrotron x-ray powder diffraction data: space group Pnma (No. 62), Z = 4 and lattice parameters a = 5.26766(1) Å, b = 7.14027(2) Å and c = 4.92231(1) Å. (Sc0.95Co0.05)CoO3 crystallizes in the GdFeO3-type structure similar to other members of the perovskite cobaltite family, ACoO3 (A3+ = Y and Pr-Lu). There is evidence that (Sc0.95Co0.05)CoO3 has non-magnetic low-spin Co3+ ions at the B site and paramagnetic high-spin Co3+ ions at the A site. In the iron-doped samples (Sc1−xMx)MO3 with M = (Co, Fe), Fe3+ ions have a strong preference to occupy the A site of such perovskites at small doping levels.


Physical Review B | 2016

Differentiation between ferroelectricity and thermally stimulated current in pyrocurrent measurements of multiferroic MMn7O12 (M= Ca, Sr, Cd, Pb)

Noriki Terada; Yana S. Glazkova; Alexei A. Belik


Journal of Physical Chemistry C | 2016

Low-Temperature Structural Modulations in CdMn7O12, CaMn7O12, SrMn7O12, and PbMn7O12 Perovskites Studied by Synchrotron X-ray Powder Diffraction and Mössbauer Spectroscopy

Alexei A. Belik; Yana S. Glazkova; Yoshio Katsuya; Masahiko Tanaka; A.V. Sobolev; Igor A. Presniakov


Dalton Transactions | 2015

High-pressure synthesis, crystal structure and magnetic properties of TlCrO3 perovskite

Wei Yi; Yoshitaka Matsushita; Yoshio Katsuya; Kazunari Yamaura; Yoshihiro Tsujimoto; Igor A. Presniakov; A.V. Sobolev; Yana S. Glazkova; Yuliya O. Lekina; Naohito Tsujii; Shigeki Nimori; Kanji Takehana; Y. Imanaka; Alexei A. Belik


Сборник материалов XIV Международной конференции «Мессбауэровская спектроскопия и ее применения» | 2016

Local crystal and magnetic structure of Ag2FeO2 and Ag2Ga0.9857Fe0.02O2: a 57Fe Mössbauer study

A.V. Sobolev; A. A. Belik; Yana S. Glazkova; Nikolay Ovanesyan; Igor A. Presniakov


ChemInform | 2015

High-Pressure Synthesis, Crystal Structures, and Properties of CdMn7O12and SrMn7O12Perovskites.

Yana S. Glazkova; Noriki Terada; Yoshitaka Matsushita; Yoshio Katsuya; Masahiko Tanaka; A.V. Sobolev; Igor A. Presniakov; Alexei A. Belik


Сборник материалов XII Международной конференции «Мессбауэровская спектроскопия и ее применения» | 2012

ELECTRIC AND MAGNETIC HYPERFINE INTERACTIONS OF 57Fe ATOMS IN FeVO4, AgFeO2 AND CuFe1-xAlxO2 MULTIFERROICS

A.V. Sobolev; V. S. Rusakov; A.M. Gapochka; Igor A. Presniakov; G. Demazeau; Yana S. Glazkova; A.G. Usvaliev; O. S. Volkova; A.N. Vasiliev

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A.V. Sobolev

Moscow State University

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Alexei A. Belik

National Institute for Materials Science

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Yoshitaka Matsushita

National Institute for Materials Science

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G. Demazeau

University of Bordeaux

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Masahiko Tanaka

National Institute for Materials Science

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Noriki Terada

National Institute for Materials Science

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Yoshio Katsuya

National Institute for Materials Science

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