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  1. Article ; Online: The rich physics of A-site-ordered quadruple perovskite manganites AMn

    Belik, Alexei A / Johnson, Roger D / Khalyavin, Dmitry D

    Dalton transactions (Cambridge, England : 2003)

    2021  Volume 50, Issue 43, Page(s) 15458–15472

    Abstract: Perovskite-structure ... ...

    Abstract Perovskite-structure AMnO
    Language English
    Publishing date 2021-11-09
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/d1dt02992d
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Triple A-Site Cation Ordering in the Ferrimagnetic Y

    Belik, Alexei A / Khalyavin, Dmitry D / Matsushita, Yoshitaka / Yamaura, Kazunari

    Inorganic chemistry

    2022  Volume 61, Issue 36, Page(s) 14428–14435

    Abstract: A new member of A-site columnar-ordered ... ...

    Abstract A new member of A-site columnar-ordered A
    Language English
    Publishing date 2022-08-31
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/acs.inorgchem.2c02343
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Effect of antifluorite layer on the magnetic order in Eu-based 1111 compounds, EuTAsF (T = Zn, Mn, and Fe).

    Plokhikh, Igor V / Tsirlin, Alexander A / Khalyavin, Dmitry D / Fischer, Henry E / Shevelkov, Andrei V / Pfitzner, Arno

    Physical chemistry chemical physics : PCCP

    2023  Volume 25, Issue 6, Page(s) 4862–4871

    Abstract: The 1111 compounds with an alternating sequence of fluorite and antifluorite layers serve as structural hosts for the vast family of Fe-based superconductors. Here, we use neutron powder diffraction and density-functional-theory (DFT) band-structure ... ...

    Abstract The 1111 compounds with an alternating sequence of fluorite and antifluorite layers serve as structural hosts for the vast family of Fe-based superconductors. Here, we use neutron powder diffraction and density-functional-theory (DFT) band-structure calculations to study magnetic order of Eu
    Language English
    Publishing date 2023-02-08
    Publishing country England
    Document type Journal Article
    ZDB-ID 1476244-4
    ISSN 1463-9084 ; 1463-9076
    ISSN (online) 1463-9084
    ISSN 1463-9076
    DOI 10.1039/d2cp04863a
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Hybrid Improper Ferroelectricity in Columnar (NaY)MnMnTi

    Scatena, Rebecca / Liu, Ran / Shvartsman, Vladimir V / Khalyavin, Dmitry D / Inaguma, Yoshiyuki / Yamaura, Kazunari / Belik, Alexei A / Johnson, Roger D

    Angewandte Chemie (International ed. in English)

    2023  Volume 62, Issue 29, Page(s) e202305994

    Abstract: We show that cation ordering on A site columns, oppositely displaced via coupling to B site octahedral tilts, results in a polar phase of the columnar perovskite (NaY) ... ...

    Abstract We show that cation ordering on A site columns, oppositely displaced via coupling to B site octahedral tilts, results in a polar phase of the columnar perovskite (NaY)MnMnTi
    Language English
    Publishing date 2023-06-13
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/anie.202305994
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  5. Article ; Online: Emergent helical texture of electric dipoles.

    Khalyavin, Dmitry D / Johnson, Roger D / Orlandi, Fabio / Radaelli, Paolo G / Manuel, Pascal / Belik, Alexei A

    Science (New York, N.Y.)

    2020  Volume 369, Issue 6504, Page(s) 680–684

    Abstract: Long-range ordering of magnetic dipoles in bulk materials gives rise to a broad range of magnetic structures, from simple collinear ferromagnets and antiferromagnets, to complex magnetic helicoidal textures stabilized by competing exchange interactions. ... ...

    Abstract Long-range ordering of magnetic dipoles in bulk materials gives rise to a broad range of magnetic structures, from simple collinear ferromagnets and antiferromagnets, to complex magnetic helicoidal textures stabilized by competing exchange interactions. In contrast, dipolar order in dielectric crystals is typically limited to parallel (ferroelectric) and antiparallel (antiferroelectric) collinear alignments of electric dipoles. Here, we report an observation of incommensurate helical ordering of electric dipoles by light hole doping of the quadruple perovskite BiMn
    Language English
    Publishing date 2020-10-07
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.aay7356
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 27: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)
    Zs.MG 77: Show issues

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  6. Article ; Online: Reentrant Structural Transitions and Collapse of Charge and Orbital Orders in Quadruple Perovskites.

    Belik, Alexei A / Matsushita, Yoshitaka / Khalyavin, Dmitry D

    Angewandte Chemie (International ed. in English)

    2017  Volume 56, Issue 35, Page(s) 10423–10427

    Abstract: Charge and orbital degrees of freedom determine properties of many materials, and are central to many important phenomena. At high temperatures, thermal fluctuations overcome them, and high-symmetry structures are realized. On decreasing temperature, ... ...

    Abstract Charge and orbital degrees of freedom determine properties of many materials, and are central to many important phenomena. At high temperatures, thermal fluctuations overcome them, and high-symmetry structures are realized. On decreasing temperature, different charge- and orbital-order transitions take place accompanied by symmetry lowering. Remarkable exceptions to this general tendency, realized in Cu-doped BiMn
    Language English
    Publishing date 2017-07-24
    Publishing country Germany
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/anie.201704798
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  7. Article ; Online: The p(O

    Yaremchenko, Aleksey A / Patrakeev, Mikhail V / Naumovich, Eugene N / Khalyavin, Dmitry D

    Physical chemistry chemical physics : PCCP

    2018  Volume 20, Issue 6, Page(s) 4442–4454

    Abstract: Cubic perovskite-type ... ...

    Abstract Cubic perovskite-type Ba
    Language English
    Publishing date 2018-02-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 1476244-4
    ISSN 1463-9084 ; 1463-9076
    ISSN (online) 1463-9084
    ISSN 1463-9076
    DOI 10.1039/c7cp07307k
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  8. Article: Cationic Ordering, Solid Solution Domain, and Diffuse Reflectance in Fe₂WO₆ Polymorphs

    Caubergh, Stéphane / Matsubara, Nami / Damay, Françoise / Fauth, François / Khalyavin, Dmitry D. / Manuel, Pascal / Mahmoud, Abdelfattah / Poelman, Dirk / Martin, Christine / Vertruyen, Bénédicte

    Journal of physical chemistry. 2021 Nov. 11, v. 125, no. 46

    2021  

    Abstract: Single phases of the α, β, and γ polymorphs of the Fe₂WO₆ iron tungsten oxide were obtained through an aqueous solution route based on the combustion and heat treatment of a spray-dried precursor powder. Syntheses with Fe/W ratios ≠ 2 identified a domain ...

    Abstract Single phases of the α, β, and γ polymorphs of the Fe₂WO₆ iron tungsten oxide were obtained through an aqueous solution route based on the combustion and heat treatment of a spray-dried precursor powder. Syntheses with Fe/W ratios ≠ 2 identified a domain of solid solutions consistent with a Fe₂–₂ₓW₁₊ₓ□ₓO₆ scenario (x up to ∼0.025) for the defect chemistry in the temperature range around 850 °C. The crystallographic characterizations revealed a random cationic distribution in an α-PbO₂-type cell for the low-temperature polymorph (α) and pointed to a reconstructive mechanism for the formation of polymorph β. A comparison of diffuse reflectance spectra confirmed the visual observation of minor color differences between the polymorphs by revealing small shifts of the absorption threshold; the Kubelka–Munk function and Tauc plots were used for comparison of the polymorphs and discussion of the results with respect to relevant literature.
    Keywords absorption ; aqueous solutions ; color ; combustion ; heat treatment ; reflectance ; spray drying ; temperature ; tungsten oxide
    Language English
    Dates of publication 2021-1111
    Size p. 25907-25916.
    Publishing place American Chemical Society
    Document type Article
    ISSN 1932-7455
    DOI 10.1021/acs.jpcc.1c08314
    Database NAL-Catalogue (AGRICOLA)

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  9. Article: Annealing-Dependent Morphotropic Phase Boundary in the BiMg

    Cardoso, João Pedro V / Shvartsman, Vladimir V / Pushkarev, Anatoli V / Radyush, Yuriy V / Olekhnovich, Nikolai M / Khalyavin, Dmitry D / Čižmár, Erik / Feher, Alexander / Salak, Andrei N

    Materials (Basel, Switzerland)

    2022  Volume 15, Issue 19

    Abstract: The annealing behavior of (1-x)BiMg0.5Ti0.5O3−xBiZn0.5Ti0.5O3 [(1-x)BMT−xBZT] perovskite solid solutions synthesized under high pressure was studied in situ via X-ray diffraction and piezoresponse force microscopy. The as prepared ceramics show a ... ...

    Abstract The annealing behavior of (1-x)BiMg0.5Ti0.5O3−xBiZn0.5Ti0.5O3 [(1-x)BMT−xBZT] perovskite solid solutions synthesized under high pressure was studied in situ via X-ray diffraction and piezoresponse force microscopy. The as prepared ceramics show a morphotropic phase boundary (MPB) between the non-polar orthorhombic and ferroelectric tetragonal states at 75 mol. % BZT. It is shown that annealing above 573 K results in irreversible changes in the phase diagram. Namely, for compositions with 0.2 < x < 0.6, the initial orthorhombic phase transforms into a ferroelectric rhombohedral phase. The new MPB between the rhombohedral and tetragonal phases lies at a lower BZT content of 60 mol. %. The phase diagram of the BMT−BZT annealed ceramics is formally analogous to that of the commercial piezoelectric material lead zirconate titanate. This makes the BMT−BZT system promising for the development of environmentally friendly piezoelectric ceramics.
    Language English
    Publishing date 2022-10-09
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma15196998
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Room-Temperature Type-II Multiferroic Phase Induced by Pressure in Cupric Oxide.

    Terada, Noriki / Khalyavin, Dmitry D / Manuel, Pascal / Orlandi, Fabio / Ridley, Christopher J / Bull, Craig L / Ono, Ryota / Solovyev, Igor / Naka, Takashi / Prabhakaran, Dharmalingam / Boothroyd, Andrew T

    Physical review letters

    2022  Volume 129, Issue 21, Page(s) 217601

    Abstract: According to previous theoretical work, the binary oxide CuO can become a room-temperature multiferroic via tuning of the superexchange interactions by application of pressure. Thus far, however, there has been no experimental evidence for the predicted ... ...

    Abstract According to previous theoretical work, the binary oxide CuO can become a room-temperature multiferroic via tuning of the superexchange interactions by application of pressure. Thus far, however, there has been no experimental evidence for the predicted room-temperature multiferroicity. Here, we show by neutron diffraction that the multiferroic phase in CuO reaches 295 K with the application of 18.5 GPa pressure. We also develop a spin Hamiltonian based on density functional theory and employing superexchange theory for the magnetic interactions, which can reproduce the experimental results. The present Letter provides a stimulus to develop room-temperature multiferroic materials by alternative methods based on existing low temperature compounds, such as epitaxial strain, for tunable multifunctional devices and memory applications.
    Language English
    Publishing date 2022-10-10
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.129.217601
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

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