Magnetic-field tuning of the spin dynamics in the magnetic topological insulators<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:msub><mml:mi>MnBi</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Te</mml:mi><mml:mn>4</mml:mn></mml:msub><mml:mo>)</mml:mo></mml:mrow><mml:msub><mml:mrow><mml:mo>(</mml:mo><mml:msub><mml:mi>Bi</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Te</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mo>)</mml:mo></mml:mrow><mml:

Alfonsov, A.; Mehlawat, Kavita; Zeugner, Alexander; Isaeva, Anna; Büchner, B.; Kataev, V.

doi:10.1103/physrevb.104.195139

Cited by 13 publications

(2 citation statements)

References 41 publications

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“…For Mn-Bi-Te system, the bulk exhibits the A-type long-range AFM order [46,48,49,80,89,169]. In 2019, Aliev et al investigated the synthesis and crystal structure of MnBi 2 Te 4 , MnBi 4 Te 7 , and MnBi 6 Te 10 [80].…”

Section: Mn-bi-te Familymentioning

confidence: 99%

Two-dimensional chalcogenide-based ferromagnetic semiconductors

Wu¹,

Li²,

Liu³

2022

J. Phys.: Condens. Matter

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Two-dimensional (2D) magnetic materials draw an enormous amount of attention due to their novel physical properties and potential spintronics device applications. Room-temperature ferromagnetic (FM) semiconductors have long been pursued in 2D magnetic materials, which show a long range magnetic order down to atomic-layer thickness. The intrinsic ferromagnetism has been predicted in a series of 2D materials and verified in experiments and the magnetism can be modulated by multiple physical field, exhibiting promising application prospect. In this review, we overview several types of 2D chalcogenide-based FM semiconductors discovered in recent years. We summary and compare their basic physical properties, including the crystal structures, electronic structures, and mechanical stability. The 2D magnetism can be described by several physical model. We also foucus on the recent progresses about theoretical prediction of FM semiconductors and experimental observation of external-field regulation. Most of investigations have shown that 2D chalcogenide-based FM semiconductors have relatively high Curie temperature (Tc) and structural stability. These materials are promising to realize the room-temperature ferromagnetism in atomic layer thickness, which is significant to design spintronics devices.

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Section: Mn-bi-te Familymentioning

confidence: 99%

Two-dimensional chalcogenide-based ferromagnetic semiconductors

Wu¹,

Li²,

Liu³

2022

J. Phys.: Condens. Matter

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“…Recently a detailed nuclear magnetic resonance (NMR) study of single crystals of Ni 2 P 2 S 6 demonstrated the sensitivity of the 31 P nuclear spin probe to quasi-2D correlations [15]. However, a direct addressing the electronic spin system of Ni 2 P 2 S 6 with electron spin resonance (ESR) spectroscopy has not been attempted so far whereas this method was recently successfully applied for studies of magnetic van der Waals topological insulators providing interesting insights onto the relationship between the spin dynamics and the electronic properties [3,[16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Low-energy excitations and magnetic anisotropy of the layered van der Waals antiferromagnet Ni$_2$P$_2$S$_6$

Mehlawat,

Alfonsov,

Selter

et al. 2021

Preprint

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The quasi-two-dimensional antiferromagnet Ni2P2S6 belongs to the family of magnetic van der Waals compounds that provides a rich material base for the realization of fundamental models of quantum magnetism in low dimensions. Here, we report high-frequency/high-magnetic field electron spin resonance measurements on single crystals of Ni2P2S6. The results enable to reliably determine the positive, 'easy'-plane type of the single ion anisotropy of the Ni 2+ ions with the upper limit of its magnitude 0.7 meV. The resonance response reveals strongly anisotropic spin fluctuations setting in shortly above the Néel temperature TN = 158 K and extending in the antiferromagnetically ordered state down to low temperatures. There, a new low-energy magnon excitation gapped from the ground state by only ∼ 1.5 meV was found. This magnon mode may explain unusual low temperature relaxation processes observed in a latest nuclear magnetic resonance experiments and together with the estimate of the single ion anisotropy they should enable setting up a realistic spin model for an accurate description of magnetic properties of Ni2P2S6.

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Disentangling the Unusual Magnetic Anisotropy of the Near‐Room‐Temperature Ferromagnet Fe₄GeTe₂

Pal,

Abraham,

Mistonov

et al. 2024

Adv Funct Materials

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In the quest for 2D conducting materials with high ferromagnetic ordering temperature the new family of the layered FenGeTe2 compounds, especially the near‐room‐temperature ferromagnet Fe4GeTe2, receives a significant attention. Fe4GeTe2 features a peculiar spin reorientation transition at TSR ≈ 110 K suggesting a non‐trivial temperature evolution of the magnetic anisotropy (MA)—one of the main contributors to the stabilization of the magnetic order in the low‐dimensional systems. An electron spin resonance (ESR) spectroscopic study reported here provides quantitative insights into the unusual magnetic anisotropy of Fe4GeTe2. At high temperatures the total MA is mostly given by the demagnetization effect with a small contribution of the counteracting intrinsic magnetic anisotropy of an easy‐axis type, whose growth below a characteristic temperature Tshape ≈ 150 K renders the sample seemingly isotropic at TSR. Below one further temperature Td ≈ 50 K the intrinsic MA becomes even more complex. Importantly, all the characteristic temperatures found in the ESR experiment match those observed in transport measurements, suggesting an inherent coupling between magnetic and electronic degrees of freedom in Fe4GeTe2. This finding together with the observed signatures of the intrinsic two‐dimensionality should facilitate optimization routes for the use of Fe4GeTe2 in the magneto‐electronic devices, potentially even in the monolayer limit.

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Magnetic-field tuning of the spin dynamics in the magnetic topological insulators(MnBi2Te4)(Bi2Te3)

Cited by 13 publications

References 41 publications

Two-dimensional chalcogenide-based ferromagnetic semiconductors

Two-dimensional chalcogenide-based ferromagnetic semiconductors

Low-energy excitations and magnetic anisotropy of the layered van der Waals antiferromagnet Ni$_2$P$_2$S$_6$

Disentangling the Unusual Magnetic Anisotropy of the Near‐Room‐Temperature Ferromagnet Fe₄GeTe₂

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Magnetic-field tuning of the spin dynamics in the magnetic topological insulators(MnBi2Te4)(Bi2Te3)

Cited by 13 publications

References 41 publications

Two-dimensional chalcogenide-based ferromagnetic semiconductors

Two-dimensional chalcogenide-based ferromagnetic semiconductors

Low-energy excitations and magnetic anisotropy of the layered van der Waals antiferromagnet Ni$_2$P$_2$S$_6$

Disentangling the Unusual Magnetic Anisotropy of the Near‐Room‐Temperature Ferromagnet Fe4GeTe2

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Disentangling the Unusual Magnetic Anisotropy of the Near‐Room‐Temperature Ferromagnet Fe₄GeTe₂