Magnetic ordering in GdAuAl<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si70.svg" display="inline" id="d1e1859"><mml:msub><mml:mrow/><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:math>Ge<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si71.svg" display="inline" id="d1e1867"><mml:msub><mml:mrow/><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math> and TbAuAl<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si70.svg" display="inline" id="d

Feng, Keke; Leahy, Ian A.; Oladehin, Olatunde; Wei, Kaya; Lee, Minhyea; Baumbach, Ryan

doi:10.1016/j.jmmm.2022.170006

Cited by 9 publications

(3 citation statements)

References 39 publications

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“…1(b), the main phase is consistent with the simulation results of GdAuAl 4 Ge 2 , and peaks of impurities introduced by the flux are marked with asterisks. [50,51] Temperature-dependent magnetic susceptibility of GdAuAl 4 Ge 2 is shown in Fig. 1(c).…”

Section: Resultsmentioning

confidence: 99%

“…The magnetic behaviors of GdAuAl 4 Ge 2 agree with recent work which reported it as a reservoir for complex magnetism and electronic behaviors such as the topological Hall effect. [51] Therefore, here we are prompted to focus on the electronic structure to directly unveil its topological property, leaving it unclear what is the detailed magnetic configuration. To uncover the topological properties of GdAuAl 4 Ge 2 , we combine ARPES measurement and DFT calculations to systematically explore its electronic structure.…”

Section: Resultsmentioning

confidence: 99%

“…Single crystals of GdAuAl 4 Ge 2 were grown by the selfflux method. [50][51][52] High purity Gd (block), Au (powder), Al (rod), and Ge (lump) were mixed with a ratio of 1:1:10:5 in the glovebox and placed into an alumina crucible. The crucible was then sealed into an evacuated quartz tube under vacuum to avoid oxidization during the reaction.…”

Section: Methodsmentioning

confidence: 99%

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Multiple surface states, nontrivial band topology, and antiferromagnetism in GdAuAl₄Ge₂

et al. 2023

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Magnetic topological states of matter provide a fertile playground for emerging topological physics and phenomena. The current main focus is on materials whose magnetism stems from 3d magnetic transition elements, e.g., MnBi2Te4, Fe3Sn2 and Co3Sn2S2. In contrast, topological materials with the magnetism from rare earth elements remain largely unexplored. Here we report rare earth antiferromagnet GdAuAl4Ge2 as a candidate magnetic topological metal. Angle resolved photoemission spectroscopy and first-principles calculations have revealed multiple bulk bands crossing the Fermi level and pairs of low energy surface states. According to the parity and Wannier charge center analyses, these bulk bands possess nontrivial Z2 topology, establishing a strong topological insulator state in the nonmagnetic phase. Furthermore, the surface band pairs exhibit strong termination dependence which provides insight into their origin. Our results suggest GdAuAl4Ge2 as a rare earth platform to explore the interplay between band topology, magnetism and f electron correlation, calling for further study targeting on its magnetic structure, magnetic topology state, transport behavior and microscopic properties.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Multiple surface states, nontrivial band topology, and antiferromagnetism in GdAuAl₄Ge₂

et al. 2023

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Transition from an incommensurate spin density wave to a commensurate magnetic order in a triangular lattice compound Ho2PdAl6Ge4

Wu,

Zhang,

Ren

et al. 2024

Journal of Alloys and Compounds

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Molecular Network Approach to Anisotropic Ising Lattices: Parsing Magnetization Dynamics in Er³⁺ Systems with 0–3-Dimensional Spin Interactivity

Orlova,

Varley,

Bernbeck

et al. 2023

J. Am. Chem. Soc.

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We present a wide-ranging interrogation of the border between single-molecule and solid-state magnetism through a study of erbium-based Ising-type magnetic compounds with a fixed magnetic unit, using three different charge-balancing cations as the means to modulate the crystal packing environment. Properties rooted in the isolated spin Hamiltonian remain fixed, yet careful observation of the dynamics reveals the breakdown of this approximation in a number of interesting ways. First, differences in crystal packing lead to a striking 3 orders of magnitude suppression in magnetic relaxation rates, indicating a rich interplay between intermolecular interactions governed by the anisotropic Ising lattice stabilization and localized slow magnetic relaxation driven by the spin-forbidden nature of quantum tunneling of the f-electron-based magnetization. By means of diverse and rigorous physical methods, including temperature-dependent X-ray crystallography, field, temperature, and time-dependent magnetometry, and the application of a new magnetization fitting technique to quantify the magnetic susceptibility peakshape, we are able to construct a more nuanced view of the role nonzero-dimensional interactions can play in what are predominantly considered zero-dimensional magnetic materials. Specifically, we use low field susceptibility and virgin-curve analysis to isolate metamagnetic spin-flip transitions in each system with a field strength corresponding to the expected strength of the internal dipole−dipole lattice. This behavior is vital to a complete interpretation of the dynamics and is likely common for systems with such high anisotropy. This collective interactivity opens a new realm of possibility for molecular magnetic materials, where their unprecedented localized anisotropy is the determining factor in building higher dimensionality.

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Magnetic ordering in GdAuAl4Ge2 and TbAuAl
Keke Feng
¹
,
Ian A. Leahy
²
,
Olatunde Oladehin
³

et al.

Cited by 9 publications

References 39 publications

Multiple surface states, nontrivial band topology, and antiferromagnetism in GdAuAl₄Ge₂

Multiple surface states, nontrivial band topology, and antiferromagnetism in GdAuAl₄Ge₂

Transition from an incommensurate spin density wave to a commensurate magnetic order in a triangular lattice compound Ho2PdAl6Ge4

Molecular Network Approach to Anisotropic Ising Lattices: Parsing Magnetization Dynamics in Er³⁺ Systems with 0–3-Dimensional Spin Interactivity

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Magnetic ordering in GdAuAl4Ge2 and TbAuAlKeke Feng1, Ian A. Leahy2, Olatunde Oladehin3 et al.

Cited by 9 publications

References 39 publications

Multiple surface states, nontrivial band topology, and antiferromagnetism in GdAuAl4Ge2

Multiple surface states, nontrivial band topology, and antiferromagnetism in GdAuAl4Ge2

Transition from an incommensurate spin density wave to a commensurate magnetic order in a triangular lattice compound Ho2PdAl6Ge4

Molecular Network Approach to Anisotropic Ising Lattices: Parsing Magnetization Dynamics in Er3+ Systems with 0–3-Dimensional Spin Interactivity

Contact Info

Product

Resources

About

Magnetic ordering in GdAuAl4Ge2 and TbAuAl
Keke Feng
¹
,
Ian A. Leahy
²
,
Olatunde Oladehin
³

et al.

Multiple surface states, nontrivial band topology, and antiferromagnetism in GdAuAl₄Ge₂

Multiple surface states, nontrivial band topology, and antiferromagnetism in GdAuAl₄Ge₂

Molecular Network Approach to Anisotropic Ising Lattices: Parsing Magnetization Dynamics in Er³⁺ Systems with 0–3-Dimensional Spin Interactivity