Spin texture induced by nonmagnetic doping and spin dynamics in 2D triangular lattice antiferromagnet h-Y(Mn,Al)O3

ORAL  · Invited

Abstract

In many geometrically frustrated magnets, a weak perturbation can potentially induce new competing ground states. In particular, novel effects induced by defects in frustrated magnets represent a highly nontrivial and interesting problem. Here, we demonstrate that a non-magnetic impurity can produce an extended spin structure (spin texture) in h-YMnO3, a triangular lattice antiferromagnet with non-collinear magnetic order. Using inelastic neutron scattering (INS), we measured the full spin-wave spectra of single-crystalline h-Y(Mn,Al)O3, which revealed the presence of magnon damping with clear momentum dependence. Our model calculation incorporating the spin texture well describes the INS data, which supports the formation of spin textures. Our study provides the first experimental confirmation of the impurity-induced spin textures. It provides new insights and understanding of the impurity effects in a wide variety of non-collinear magnetic systems.

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Publication: Nature Communications 12, 2306 (2021)

Presenters

  • Pyeongjae Park

    • Seoul National University
    • Seoul Natl Univ

Authors

  • Pyeongjae Park

    • Seoul National University
    • Seoul Natl Univ

  • Kisoo Park

    • Seoul national university

  • Joosung Oh

    • Seoul national university

  • Ki Hoon Lee

    • Incheon National University

  • Jonathan Leiner

    • Technical University of Munich

  • Hasung Sim

    • Seoul National University

  • Taehun Kim

    • Brookhaven National Laboratory

  • Jaehong Jeong

    • Seoul National University

  • Kirrily Rule

    • Australian Nuclear Science and Technology Organisation

  • Kazuya Kamazawa

    • Neutron Science and Technology Center, CROSS, Japan
    • Comprehensive Research Organization for Science and Society

  • Kazuki Iida

    • Comprehensive Research Organization for Science and Society

  • Toby Perring

    • ISIS Pulsed Neutron and Muon Source

  • Hyungje Woo

    • Brookhaven National Laboratory

  • Sang-Wook Cheong

    • Rutgers University, New Brunswick
    • Rutgers University

  • Mike Zhitomirsky

    • Université Grenoble Alpes

  • Alexander L Chernyshev

    • University of California, Irvine

  • Je-Geun Park

    • Seoul Natl Univ