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  1. Article ; Online: Emergent many-body composite excitations of interacting spin-1/2 trimers.

    Bera, Anup Kumar / Yusuf, S M / Saha, Sudip Kumar / Kumar, Manoranjan / Voneshen, David / Skourski, Yurii / Zvyagin, Sergei A

    Nature communications

    2022  Volume 13, Issue 1, Page(s) 6888

    Abstract: Understanding exotic forms of magnetism in quantum spin systems is an emergent topic of modern condensed matter physics. Quantum dynamics can be described by particle-like carriers of information, known-as quasiparticles that appear from the collective ... ...

    Abstract Understanding exotic forms of magnetism in quantum spin systems is an emergent topic of modern condensed matter physics. Quantum dynamics can be described by particle-like carriers of information, known-as quasiparticles that appear from the collective behaviour of the underlying system. Spinon excitations, governing the excitations of quantum spin-systems, have been accurately calculated and precisely verified experimentally for the antiferromagnetic chain model. However, identification and characterization of novel quasiparticles emerging from the topological excitations of the spin system having periodic exchange interactions are yet to be obtained. Here, we report the identification of emergent composite excitations of the novel quasiparticles doublons and quartons in spin-1/2 trimer-chain antiferromagnet Na
    Language English
    Publishing date 2022-11-12
    Publishing country England
    Document type Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-022-34342-1
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  2. Article ; Online: Optically Triggered Néel Vector Manipulation of a Metallic Antiferromagnet Mn

    Grigorev, Vladimir / Filianina, Mariia / Lytvynenko, Yaryna / Sobolev, Sergei / Pokharel, Amrit Raj / Lanz, Amon P / Sapozhnik, Alexey / Kleibert, Armin / Bodnar, Stanislav / Grigorev, Petr / Skourski, Yurii / Kläui, Mathias / Elmers, Hans-Joachim / Jourdan, Martin / Demsar, Jure

    ACS nano

    2022  

    Abstract: The absence of stray fields, their insensitivity to external magnetic fields, and ultrafast dynamics make antiferromagnets promising candidates for active elements in spintronic devices. Here, we demonstrate manipulation of the Néel vector in the ... ...

    Abstract The absence of stray fields, their insensitivity to external magnetic fields, and ultrafast dynamics make antiferromagnets promising candidates for active elements in spintronic devices. Here, we demonstrate manipulation of the Néel vector in the metallic collinear antiferromagnet Mn
    Language English
    Publishing date 2022-11-21
    Publishing country United States
    Document type Journal Article
    ISSN 1936-086X
    ISSN (online) 1936-086X
    DOI 10.1021/acsnano.2c07453
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  3. Article ; Online: New type of magnetic structure in the R

    Maskova-Cerna, Silvie / Klicpera, Milan / Svoboda, Pavel / Andreev, Alexander V / Skourski, Yurii / Reehuis, Manfred / Hoffmann, Jens-Uwe / André, Gilles / Havela, Ladislav

    Journal of physics. Condensed matter : an Institute of Physics journal

    2020  Volume 32, Issue 34, Page(s) 345801

    Abstract: Anisotropy of bulk magnetic properties and magnetic structure studies of a ... ...

    Abstract Anisotropy of bulk magnetic properties and magnetic structure studies of a Tb
    Language English
    Publishing date 2020-03-27
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472968-4
    ISSN 1361-648X ; 0953-8984
    ISSN (online) 1361-648X
    ISSN 0953-8984
    DOI 10.1088/1361-648X/ab8428
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  4. Book ; Online: MoP$_3$SiO$_{11}$

    Badrtdinov, Danis I. / Ding, Lei / Ritter, Clemens / Hembacher, Jan / Ahmed, Niyaz / Skourski, Yurii / Tsirlin, Alexander A.

    a $4d^3$ honeycomb antiferromagnet with disconnected octahedra

    2021  

    Abstract: We report the crystal structure and magnetic behavior of the $4d^3$ spin-$\frac32$ silicophosphate MoP$_3$SiO$_{11}$ studied by high-resolution synchrotron x-ray diffraction, neutron diffraction, thermodynamic measurements, and ab initio band-structure ... ...

    Abstract We report the crystal structure and magnetic behavior of the $4d^3$ spin-$\frac32$ silicophosphate MoP$_3$SiO$_{11}$ studied by high-resolution synchrotron x-ray diffraction, neutron diffraction, thermodynamic measurements, and ab initio band-structure calculations. Our data revise the crystallographic symmetry of this compound and establish its rhombohedral space group ($R\bar 3c$) along with the geometrically perfect honeycomb lattice of the Mo$^{3+}$ ions residing in disconnected MoO$_6$ octahedra. Long-range antiferromagnetic order with the propagation vector $\mathbf k=0$ observed below $T_N=6.8$ K is a combined effect of the nearest-neighbor in-plane exchange coupling $J\simeq 2.6$ K, easy-plane single-ion anisotropy $D\simeq 2.2 $ K, and a weak interlayer coupling $J_c\simeq 0.8$ K. The 12% reduction in the ordered magnetic moment of the Mo$^{3+}$ ions and the magnon gap of $\Delta\simeq 7$ K induced by the single-ion anisotropy further illustrate the impact of spin-orbit coupling on the magnetism. Our analysis puts forward single-ion anisotropy as an important ingredient of $4d^3$ honeycomb antiferromagnets despite their nominally quenched orbital moment.

    Comment: published version
    Keywords Condensed Matter - Strongly Correlated Electrons ; Condensed Matter - Materials Science
    Subject code 530
    Publishing date 2021-07-19
    Publishing country us
    Document type Book ; Online
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  5. Book ; Online: Au4Mn, a localized ferromagnet with strong spin-orbit coupling, long-range ferromagnetic exchange and high Curie temperature

    He, Yangkun / Gercsi, Zsolt / Zhang, Rui / Kang, Yu / Skourski, Yurii / Prendeville1, Lucy / Larmour, Orrie / Besbas, Jean / Felser, Claudia / Stamenov, Plamen / Coey, J. M. D.

    2022  

    Abstract: Metallic Mn-based alloys with a nearest-neighbor Mn-Mn distance greater than 0.4 nm exhibit large, well-localized magnetic moments. Here we investigate the magnetism of tetragonal Au4Mn with a Curie temperature of 385 K, where manganese has a spin moment ...

    Abstract Metallic Mn-based alloys with a nearest-neighbor Mn-Mn distance greater than 0.4 nm exhibit large, well-localized magnetic moments. Here we investigate the magnetism of tetragonal Au4Mn with a Curie temperature of 385 K, where manganese has a spin moment of 4.1 muB and its orbital moment is quenched. Since 80% of the atoms are gold, the spin orbit interaction is strong and Au4Mn exhibits uniaxial magnetocrystalline anisotropy with surface maze domains at room temperature. The magnetic hardness parameter of 1.0 is sufficient to maintain the magnetization along the c-axis for a sample of any shape. Au also reduces the spin moment of Mn through 5d-3d orbital hybridization. An induced moment of 0.05 muB was found on Au under a pulsed field of 40 T. Density functional theory calculations indicate that the Mn-Mn exchange is mediated by spin-polarized gold 5d and 6p electrons. The distance-dependence shows that it is ferromagnetic or zero for the first ten shells of Mn neighbors out to 1.041 nm (64 atoms), and very weak and oscillatory thereafter.
    Keywords Condensed Matter - Materials Science
    Subject code 530
    Publishing date 2022-10-25
    Publishing country us
    Document type Book ; Online
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  6. Book ; Online: Optically-triggered strain-driven N\'{e}el vector manipulation in a metallic antiferromagnet

    Grigorev, Vladimir / Filianina, Mariia / Lytvynenko, Yaryna / Sobolev, Sergei / Pokharel, Amrit R. / Sapozhnik, Alexey / Kleibert, Armin / Bodnar, Stanislav Yu. / Grigorev, Petr / Skourski, Yurii / Kläui, Mathias / Elmers, Hans-Joachim / Jourdan, Martin / Demsar, Jure

    2022  

    Abstract: The absence of stray fields, their insensitivity to external magnetic fields, and ultrafast dynamics make antiferromagnets promising candidates for active elements in spintronic devices. Here, we demonstrate manipulation of the N\'{e}el vector in the ... ...

    Abstract The absence of stray fields, their insensitivity to external magnetic fields, and ultrafast dynamics make antiferromagnets promising candidates for active elements in spintronic devices. Here, we demonstrate manipulation of the N\'{e}el vector in the metallic collinear antiferromagnet Mn$_2$Au by combining strain and femtosecond laser excitation. Applying tensile strain along either of the two in-plane easy axes and locally exciting the sample by a train of femtosecond pulses, we align the N\'{e}el vector along the direction controlled by the applied strain. The dependence on the laser fluence and strain suggests the alignment is a result of optically-triggered depinning of 90$^{\mathrm{o}}$ domain walls and their sliding in the direction of the free energy gradient, governed by the magneto-elastic coupling. The resulting, switchable, state is stable at room temperature and insensitive to magnetic fields. Such an approach may provide ways to realize robust high-density memory device with switching timescales in the picosecond range.
    Keywords Condensed Matter - Materials Science ; Condensed Matter - Mesoscale and Nanoscale Physics ; Condensed Matter - Other Condensed Matter
    Subject code 530
    Publishing date 2022-05-11
    Publishing country us
    Document type Book ; Online
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  7. Article ; Online: Field-Modulated Anomalous Hall Conductivity and Planar Hall Effect in Co

    Yang, Shuo-Ying / Noky, Jonathan / Gayles, Jacob / Dejene, Fasil Kidane / Sun, Yan / Dörr, Mathias / Skourski, Yurii / Felser, Claudia / Ali, Mazhar Nawaz / Liu, Enke / Parkin, Stuart S P

    Nano letters

    2020  Volume 20, Issue 11, Page(s) 7860–7867

    Abstract: Time-reversal-symmetry-breaking Weyl semimetals (WSMs) have attracted great attention recently because of the interplay between intrinsic magnetism and topologically nontrivial electrons. Here, we present anomalous Hall and planar Hall effect studies on ... ...

    Abstract Time-reversal-symmetry-breaking Weyl semimetals (WSMs) have attracted great attention recently because of the interplay between intrinsic magnetism and topologically nontrivial electrons. Here, we present anomalous Hall and planar Hall effect studies on Co
    Language English
    Publishing date 2020-10-09
    Publishing country United States
    Document type Journal Article
    ISSN 1530-6992
    ISSN (online) 1530-6992
    DOI 10.1021/acs.nanolett.0c02219
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  8. Article ; Online: Colossal angular magnetoresistance in ferrimagnetic nodal-line semiconductors.

    Seo, Junho / De, Chandan / Ha, Hyunsoo / Lee, Ji Eun / Park, Sungyu / Park, Joonbum / Skourski, Yurii / Choi, Eun Sang / Kim, Bongjae / Cho, Gil Young / Yeom, Han Woong / Cheong, Sang-Wook / Kim, Jae Hoon / Yang, Bohm-Jung / Kim, Kyoo / Kim, Jun Sung

    Nature

    2021  Volume 599, Issue 7886, Page(s) 576–581

    Abstract: Efficient magnetic control of electronic conduction is at the heart of spintronic functionality for memory and logic ... ...

    Abstract Efficient magnetic control of electronic conduction is at the heart of spintronic functionality for memory and logic applications
    Language English
    Publishing date 2021-11-24
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 120714-3
    ISSN 1476-4687 ; 0028-0836
    ISSN (online) 1476-4687
    ISSN 0028-0836
    DOI 10.1038/s41586-021-04028-7
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 26: Show issues Location:
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    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
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  9. Book ; Online: Magnetic phase diagram and magneto-elastic coupling of NiTiO3

    Dey, Kaustav / Sauerland, Sven / Werner, Johannes / Skourski, Yurii / Abdel-Hafiez, Mahmoud / Bag, Rabindranath / Singh, Surjeet / Klingeler, Rüdiger

    2020  

    Abstract: We report high-resolution dilatometry on high-quality single crystals of NiTiO3 grown by means of the optical floating-zone technique. The anisotropic magnetic phase diagram is constructed from thermal expansion and magnetostriction studies up to B=15T ... ...

    Abstract We report high-resolution dilatometry on high-quality single crystals of NiTiO3 grown by means of the optical floating-zone technique. The anisotropic magnetic phase diagram is constructed from thermal expansion and magnetostriction studies up to B=15T and magnetization studies in static (15T) and pulsed (60T) magnetic fields. Our data allow to quantitatively study magneto-elastic coupling and to determine uniaxial pressure dependencies. While the entropy changes are found to be of magnetic nature, Gr\"{u}neisen analysis implies only one relevant energy scale in the whole low-temperature regime. Thereby, our data suggest that the observed structural changes due to magneto-elastic coupling and previously reported magnetodielectric coupling[1] are driven by the same $magnetic$ degrees of freedom that lead to long-range magnetic order in NiTiO3, which in turn, establishes a linear magnetodielectric coupling in this compound.
    Keywords Condensed Matter - Strongly Correlated Electrons ; Condensed Matter - Materials Science
    Subject code 530
    Publishing date 2020-02-18
    Publishing country us
    Document type Book ; Online
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  10. Article ; Online: Two types of magnetic shape-memory effects from twinned microstructure and magneto-structural coupling in Fe

    Rößler, Sahana / Koz, Cevriye / Wang, Zhaosheng / Skourski, Yurii / Doerr, Mathias / Kasinathan, Deepa / Rosner, Helge / Schmidt, Marcus / Schwarz, Ulrich / Rößler, Ulrich K / Wirth, Steffen

    Proceedings of the National Academy of Sciences of the United States of America

    2019  Volume 116, Issue 34, Page(s) 16697–16702

    Abstract: A detailed experimental investigation of ... ...

    Abstract A detailed experimental investigation of Fe
    Language English
    Publishing date 2019-08-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.1905271116
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    Zs.A 1148: Show issues Location:
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