Magnetic anisotropy and topological Hall effect in the trigonal chromium tellurides 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Cr</mml:mi><mml:mn>5</mml:mn></mml:msub><mml:msub><mml:mi>Te</mml:mi><mml:mn>8</mml:mn></mml:msub></mml:mrow></mml:math>

Wang, Yihao; Yan, Jian; Li, Junbo; Wang, Shasha; Song, Minghao; Song, Jiangpeng; Li, Zhihao; Chen, Ke; Qin, Yuchang; Ling, Langsheng; Du, Haifeng; Cao, Liang; Luo, Xuan; Xiong, Yimin; Sun, Yan

doi:10.1103/physrevb.100.024434

Cited by 60 publications

(37 citation statements)

References 61 publications

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“…From inspecting Figure 4b, we conclude that the two intra-sublattices for δ = 1 are physically indistinguishable, and therefore J11 and J22 should behave similarly. As a consistency check, we find that our DFT calculations correctly reproduce this similarity (Figure 4d), and are also in line with previous calculations for individual dopings [21,22,23,24].…”

Section: Theoretical Calculationssupporting

confidence: 91%

“…Previous studies of bulk crystals grown with varying compositions e.g. CrTe [14,15,16], Cr3Te 4 [17], Cr2Te 3 [18,26], Cr5Te 8 [19,20,21,22], and CrTe2 [23,24,25] -were shown to have the same NiAs-type structure, with ferromagnetic transition temperature (TC) ranging between 170 to 350 K. The notation Cr1+δTe 2 conveniently represents the compositions of all these compounds, wherein δ is the fraction of Cr atoms self-intercalated between neighboring CrTe2 layers (see Figure 1a). Notably, in addition to conventional ferromagnetic (FM) interaction, Cr1+δTe 2 bulk crystals are suggested to host antiferromagnetic (AF) interactions, noncollinear spin textures, and tunable magnetic anisotropy [27, 28,29,30].…”

Section: Introductionmentioning

confidence: 99%

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Tailoring magnetism in self-intercalated Cr1+δTe2 epitaxial films

Fujisawa

Pardo-Almanza

Garland

et al. 2020

Phys. Rev. Materials

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Magnetic transition metal dichalcogenide (TMD) films have recently emerged as promising candidates to host novel magnetic phases relevant to next-generation spintronic devices. However, systematic control of the magnetization orientation, or anisotropy, and its thermal stability, characterized by Curie temperature (Tc) -remains to be achieved in such films. Here we present self-intercalated epitaxial Cr1+δTe 2 films as a platform for achieving systematic/smooth magnetic tailoring in TMD films. Using a molecular beam epitaxy (MBE) based technique, we have realized epitaxial Cr1+δTe 2 films with smoothly tunable  over a wide range (0.33-0.82), while maintaining NiAs-type crystal structure. With increasing δ, we found monotonic enhancement of Tc from 160 to 350 K, and the rotation of magnetic anisotropy from out-of-plane to in-plane easy axis configuration for fixed film thickness. Contributions from conventional dipolar and orbital moment terms are insufficient to explain the observed evolution of magnetic behavior with δ. Instead, ab initio calculations suggest that the emergence of antiferromagnetic interactions with δ, and its interplay with conventional ferromagnetism, may play a key role in the observed trends. To our knowledge, this constitutes the first demonstration of tunable Tc and magnetic anisotropy across room temperature in TMD films, and paves the way for engineering novel magnetic phases for spintronic applications.

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Section: Theoretical Calculationssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Tailoring magnetism in self-intercalated Cr1+δTe2 epitaxial films

Fujisawa

Pardo-Almanza

Garland

et al. 2020

Phys. Rev. Materials

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“…There are various stable stoichiometries reported for chromium chalcogenides [e.g., CrTe 23,24 , Cr 2 Te 3 25,26 , and Cr 5 Te 8 27,28 ] depending on the Cr vacancies that occur in intercalation. However, none of them belongs to layered compounds with interlayer vdW gap, except for CrTe 2 .…”

Section: Resultsmentioning

confidence: 99%

Room-temperature intrinsic ferromagnetism in epitaxial CrTe2 ultrathin films

et al. 2021

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While the discovery of two-dimensional (2D) magnets opens the door for fundamental physics and next-generation spintronics, it is technically challenging to achieve the room-temperature ferromagnetic (FM) order in a way compatible with potential device applications. Here, we report the growth and properties of single- and few-layer CrTe2, a van der Waals (vdW) material, on bilayer graphene by molecular beam epitaxy (MBE). Intrinsic ferromagnetism with a Curie temperature (TC) up to 300 K, an atomic magnetic moment of ~0.21 $${\mu }_{{\rm{B}}}$$ μ B /Cr and perpendicular magnetic anisotropy (PMA) constant (Ku) of 4.89 × 105 erg/cm3 at room temperature in these few-monolayer films have been unambiguously evidenced by superconducting quantum interference device and X-ray magnetic circular dichroism. This intrinsic ferromagnetism has also been identified by the splitting of majority and minority band dispersions with ~0.2 eV at Г point using angle-resolved photoemission spectroscopy. The FM order is preserved with the film thickness down to a monolayer (TC ~ 200 K), benefiting from the strong PMA and weak interlayer coupling. The successful MBE growth of 2D FM CrTe2 films with room-temperature ferromagnetism opens a new avenue for developing large-scale 2D magnet-based spintronics devices.

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“…Indeed, the existence of the THE close to saturation was similarly observed in DyCo3 films [28] and Co-Ir-Pt multi-layered films [29] , where skyrmions were observed. In bulk materials such as Fe5Sn3 [30] , MnP, [31] and Cr5Te8 [32] , the THE was found at low fields owing to the non-coplanar spin structure.…”

Section: Figure 2amentioning

confidence: 99%