Curie temperature engineering in a novel 2D analog of iron ore (hematene) <i>via</i> strain

Singla, Renu; Hackett, Timothy A.; Kumar, Sarvesh; Sharma, Jyotsna; Kashyap, Manish K.

doi:10.1039/d0na00556h

Cited by 14 publications

(11 citation statements)

References 33 publications

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“…The MAE is originated because of the reliance of magnetic attributes on a specific crystallographic direction. Classically, dipole–dipole interactions are believed to be the origin of MAE, nonetheless quantum mechanically, the main cause lies in SOC [ 29 ]. For that reason, SOC effects should be considered in the evaluation of MAE.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, spintronic devices such as magnetic tunnel junctions and spin valves show enhanced performance based on 2D magnetic structures with substantial magnetic anisotropy [ 25 , 26 , 27 ]. It has been demonstrated that strain engineering is an effective method of tuning the magnetic, electronic and optical characteristics of materials [ 28 , 29 , 30 , 31 , 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

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Correlation-Driven Topological Transition in Janus Two-Dimensional Vanadates

et al. 2023

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The appearance of intrinsic ferromagnetism in 2D materials opens the possibility of investigating the interplay between magnetism and topology. The magnetic anisotropy energy (MAE) describing the easy axis for magnetization in a particular direction is an important yardstick for nanoscale applications. Here, the first-principles approach is used to investigate the electronic band structures, the strain dependence of MAE in pristine VSi2Z4 (Z = P, As) and its Janus phase VSiGeP2As2 and the evolution of the topology as a function of the Coulomb interaction. In the Janus phase the compound presents a breaking of the mirror symmetry, which is equivalent to having an electric field, and the system can be piezoelectric. It is revealed that all three monolayers exhibit ferromagnetic ground state ordering, which is robust even under biaxial strains. A large value of coupling J is obtained, and this, together with the magnetocrystalline anisotropy, will produce a large critical temperature. We found an out-of-plane (in-plane) magnetization for VSi2P4 (VSi2As4), and an in-plane magnetization for VSiGeP2As2. Furthermore, we observed a correlation-driven topological transition in the Janus VSiGeP2As2. Our analysis of these emerging pristine and Janus-phased magnetic semiconductors opens prospects for studying the interplay between magnetism and topology in two-dimensional materials.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Correlation-Driven Topological Transition in Janus Two-Dimensional Vanadates

et al. 2023

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“…This certain temperature is called the Curie temperature (T C ). 98 For decades, it is indicated that ferromagnetism is difficult to exist in twodimensional crystals. However, discovering 2D intrinsic ferromagnetic crystals indicates that magnetic anisotropy in 2D crystals stabilizes long-range ferromagnetic orders and resists thermal disturbance by opening the excitation gap.…”

Section: Ferromagnetismmentioning

confidence: 99%

Two-dimensional magnetic atomic crystals

Zhang

Yang

et al. 2022

Mater. Horiz.

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“…25−27 Previous study revealed that the curie temperature increases monotonically with the compressive strains in hematene, which broadens its applications for spintronic, memory-based devices and valleytronics. 25 The optical and electronic properties of single-and multilayer hematene have been investigated by theoretical simulations; the prominent peak of the optical spectra shifts to higher energy, and the Morin transition temperature increases when it is reduced to a monolayer. 23 Additionally, Shang et al 24 claimed that Lidecorated hematene has a net out-of-plane magnetization on surface Fe atoms induced by the ferroelectric and ferromagnetic polarization.…”

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confidence: 99%

“…Subsequently, the hematene was successfully synthesized by different experimental methods, i.e., sonication, soft-chemical exfoliation, and microwave liquid-phase synthesis . The 2D hematene can be easily modulated and exhibits unique properties in comparison to its bulk counterpart. , Hematene has a narrower band gap compared to hematite, and it is an antiferromagnetic ground-state semiconductor. − Previous study revealed that the curie temperature increases monotonically with the compressive strains in hematene, which broadens its applications for spintronic, memory-based devices and valleytronics . The optical and electronic properties of single- and multilayer hematene have been investigated by theoretical simulations; the prominent peak of the optical spectra shifts to higher energy, and the Morin transition temperature increases when it is reduced to a monolayer .…”

mentioning

confidence: 99%