Incommensurate magnetic order in the 
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 kagome metal 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>GdV</mml:mi><mml:mn>6</mml:mn></mml:msub><mml:msub><mml:mi>Sn</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:mrow></mml:math>

Porter, Zach; Pokharel, Ganesh; Kim, Jong Woo; Ryan, P. J.; Wilson, Stephen D.

doi:10.1103/physrevb.108.035134

Phys. Rev. B

2023

DOI: 10.1103/physrevb.108.035134

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Incommensurate magnetic order in the Z2 kagome metal GdV6Sn6

Zach Porter

Ganesh Pokharel

Jong Woo Kim

et al.

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2024

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Cited by 3 publications

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“…In comparison to the uniaxial magnetism of TbV6Sn6, the magnetic order of GdV6Sn6 is more complicated because the Gd moments likely tend to orient within the kagome planes. [55] The magnetization measurements indicate that GdV6Sn6 shows a weak anisotropy with the coexistence of out-of-plane ferromagnetism and in-plane antiferromagnetism (see Fig. S1 in the Supplementary Materials and Ref.…”

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confidence: 99%

Pressure-Tuned Intrinsic Anomalous Hall Conductivity in Kagome Magnets RV₆Sn₆ (R = Gd, Tb)

Kong 孔,

Tao 陶,

Zhang 张

et al. 2024

Chinese Phys. Lett.

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Exploration of exotic phenomena in magnetic topological systems is at the frontier of condensed matter physics, holding a significant promise for the applications in topological spintronics. However, complex magnetic structures carrying nontrivial topological properties hinder its progresses. Here, we investigate the pressure effect on the novel topological kagome magnets GdV6Sn6 and TbV6Sn6 to dig out the interplay between magnetic Gd/Tb layers and nonmagnetic V-based kagome sublattice. The pressure-tuned magnetic transition temperature T m in both compounds exhibit a turning point at the critical pressure P c, accompanying with a sign reversal in anomalous Hall effect (AHE). The separation of intrinsic and extrinsic contributions using the TYJ scaling model suggests that the intrinsic mechanism originating from the electronic Berry curvature holds the priority in the competition with extrinsic mechanism in AHE. Above findings can be attributed to the combined effect of pressure-tuned band topology and magnetic interaction in segregated layers. Our results provide a practical route to design and manipulate the intrinsic AHE in magnetic topological materials.

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confidence: 99%

Pressure-Tuned Intrinsic Anomalous Hall Conductivity in Kagome Magnets RV₆Sn₆ (R = Gd, Tb)

Kong 孔,

Tao 陶,

Zhang 张

et al. 2024

Chinese Phys. Lett.

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New insight into tuning magnetic phases of RMn6Sn6 kagome metals

Riberolles,

Han,

Slade

et al. 2024

npj Quantum Mater.

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Predicting magnetic ordering in kagome compounds offers the possibility of harnessing topological or flat-band physical properties through tuning of the magnetism. Here, we examine the magnetic interactions and phases of ErMn6Sn6 which belongs to a family of RMn6Sn6, R = Sc, Y, Gd–Lu, compounds with magnetic kagome Mn layers, triangular R layers, and signatures of topological properties. Using results from single-crystal neutron diffraction and mean-field analysis, we find that ErMn6Sn6 sits close to the critical boundary separating the spiral-magnetic and ferrimagnetic ordered states typical for non-magnetic versus magnetic R layers, respectively. Finding interlayer magnetic interactions and easy-plane Mn magnetic anisotropy consistent with other members of the family, we predict the existence of a number of temperature and field dependent collinear, noncollinear, and noncoplanar magnetic phases. We show that thermal fluctuations of the Er magnetic moment, which act to weaken the Mn-Er interlayer magnetic interaction and quench the Er magnetic anisotropy, dictate magnetic phase stability. Our results provide a starting point and outline a multitude of possibilities for studying the behavior of Dirac fermions in RMn6Sn6 compounds with control of the Mn spin orientation and real-space spin chirality.

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Ground-state magnetic structures of topological kagome metals RV6Sn6 (R=Tb,Dy,
Zhou,
Lee,
Hammouda
et al. 2024
Phys. Rev. Research
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Magnetic kagome metals have attracted tremendous research interests recently, because they represent an ideal playground for exploring the fascinating interplay between their intrinsically inherited topologically nontrivial electron band structures, magnetism and electronic correlation effects, and the resultant novel electronic/magnetic states and emergent excitations. In this work, we report a comprehensive single-crystal neutron diffraction investigation of the ground-state magnetic structures of the recently discovered V-based topological kagome metals RV6Sn6 ( = Tb, Dy, Ho, Er). Furthermore, the sample synthesis details and our systematic studies of crystal structure, low-temperature magnetic and thermodynamic properties of these compounds via various in-house characterization techniques are also reported. Our single-crystal neutron diffraction measurements confirm that the long-range magnetic order forms below 4.3 K for R=Tb, 3.0 K for R=Dy, 2.4 K for R=Ho, and 0.6 K for R=Er, respectively. The ground-state magnetic structures of the studied compounds are comprehensively determined via the magnetic crystallography approaches. It can be revealed that RV6Sn6 (R = Tb, Dy, Ho) have a collinear ferromagnetic order in the ground state, with the ordered magnetic moment aligned along the c axis for R = Tb, Ho, while approximately 20∘ tilted off from the c axis for R = Dy. In contrast, ErV6Sn6 shows an A-type antiferromagnetic structure with a magnetic propagation vector = (0, 0, 0.5), and with the ordered magnetic moment aligned in the ab plane. The ordered magnetic moments are determined as 9.4(2) µB, 6.6(2) µB, 6.4(2) µB, and 6.1(2) µB for R = Tb, Dy, Ho, and Er, respectively. A comparison of the low-temperature magnetic structures for both the extensively investigated topological kagome metal series of RV6Sn6 and RMn6Sn6 is given in detail. This allows to gain new insights into the complex magnetic interactions, diverse single-ion magnetic anisotropies and spin dynamics in these compounds. The reported ground-state magnetic structures in RV6Sn6 (R = Tb, Dy, Ho, Er) can pave the way for further explorations of the possible interplay between magnetism and topologically nontrivial electron band structures in the magnetically ordered phase regime. Published by the American Physical Society 2024

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Incommensurate magnetic order in the Z2 kagome metal GdV6Sn6

Cited by 3 publications

References 31 publications

Pressure-Tuned Intrinsic Anomalous Hall Conductivity in Kagome Magnets RV₆Sn₆ (R = Gd, Tb)

Pressure-Tuned Intrinsic Anomalous Hall Conductivity in Kagome Magnets RV₆Sn₆ (R = Gd, Tb)

New insight into tuning magnetic phases of RMn6Sn6 kagome metals

Ground-state magnetic structures of topological kagome metals RV6Sn6 (R=Tb,Dy,
Zhou,
Lee,
Hammouda
et al. 2024
Phys. Rev. Research
0
0
0
0
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Incommensurate magnetic order in the Z2 kagome metal GdV6Sn6

Cited by 3 publications

References 31 publications

Pressure-Tuned Intrinsic Anomalous Hall Conductivity in Kagome Magnets RV6Sn6 (R = Gd, Tb)

Pressure-Tuned Intrinsic Anomalous Hall Conductivity in Kagome Magnets RV6Sn6 (R = Gd, Tb)

New insight into tuning magnetic phases of RMn6Sn6 kagome metals

Ground-state magnetic structures of topological kagome metals RV6Sn6 (R=Tb,Dy,Zhou, Lee, Hammouda et al. 2024Phys. Rev. Research0000View full textAdd to dashboardCite

Contact Info

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About

Pressure-Tuned Intrinsic Anomalous Hall Conductivity in Kagome Magnets RV₆Sn₆ (R = Gd, Tb)

Pressure-Tuned Intrinsic Anomalous Hall Conductivity in Kagome Magnets RV₆Sn₆ (R = Gd, Tb)

Ground-state magnetic structures of topological kagome metals RV6Sn6 (R=Tb,Dy,
Zhou,
Lee,
Hammouda
et al. 2024
Phys. Rev. Research
0
0
0
0
View full text Add to dashboard Cite