Embedding atomic cobalt into graphene lattices to activate room-temperature ferromagnetism

Hu, Wei; Wang, Chao; Tan, Hao; Duan, Hengli; Li, Guinan; Li, Na; Ji, Qianqian; Lü, Ying; Wang, Yao; Sun, Zhihu; Hu, Fengchun; Yan, Wensheng

doi:10.1038/s41467-021-22122-2

Cited by 101 publications

(103 citation statements)

References 62 publications

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“…The planar M N 4 (M =metal) moiety embedded in graphene sheet acting as single atom catalyst has been identified experimentally [3][4][5], in which more than twenty different metals, including noble metals and nonnoble metals, are employed to synthesize the M N 4graphene structure. Very recently, the room-temperature ferromagnetism in CoN 4 -graphene systems has been observed [6]. In theoretical studies, the planar cobalt carbonitrides CoN 4 C 10 , Co 2 N 8 C 6 , Co 2 N 6 C 6 , and CoN 4 C 2 are predicted and their stability is confirmed by the firstprinciples calculations [7,8].…”

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confidence: 88%

Two-dimensional binary transition metal nitride $M$N$_4$ ($M$ = V, Cr, Mn, Fe, Co) with a graphene-like structure and strong magnetic properties

Zhang¹,

Feng²,

Liu³

et al. 2022

Preprint

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Binary transition metal nitride with a graphene-like structure and strong magnetic properties is rare. Based on the first-principles calculations, we design two kinds of M N4 (M =transition metal) monolayers, which are transition metal nitrides with a planar structure, made up of M N4 units aligned in the rhombic and squared patterns. The two structural lattices have robust stability and good compatibility with different metal atoms, and the underlying mechanism is the combination of sp 2 hybridization, coordinate bond, and π conjugation. With metal atom changing from V, Cr, Mn, Fe to Co, the total charge of M N4 system increases by one electron in turn, which results in continuous adjustability of the electronic and magnetic properties. The planar ligand field is another feature of the two M N4 lattices, which brings about the special splitting of five suborbitals of 3d metal atom and gives rise to large local moment and strong magnetism. Moreover, we uncover s-CoN4 monolayer to be high temperature ferromagnetic two-dimensional material and the Curie temperatures of 613.9 K is determined by the tensor renormalization group method.

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confidence: 88%

Two-dimensional binary transition metal nitride $M$N$_4$ ($M$ = V, Cr, Mn, Fe, Co) with a graphene-like structure and strong magnetic properties

Zhang¹,

Feng²,

Liu³

et al. 2022

Preprint

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“…Two-dimensional (2D) materials with outstanding structural, chemical, and physical properties − have attracted intensive attention in the past decade, promising for technological applications. − Compared with 2D inorganic materials, increasing efforts have been committed to organic π-conjugated nanosheets prepared by self-assembly due to their diversity of physical and chemical properties and topological structure. , In this context, 2D molecular frameworks are reliant on the coordination chemistry between chelating units that result in the hybridization of the d-orbits of transition metals and frontier orbits of conjugated aromatic ligands containing functional groups such as hydroxy group, amino group, and sulfhydryl group. For instance, a 2D π–d conjugated coordination Cu-BHT (benzenehexathiol) system has shown high electrical conductivity, while 2D Cu 2 (TCPP) (TCPP = meso-tetra(4-carboxyphenyl)porphine) has been applied to electronic devices .…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Conductive π–d Frameworks with Multiple Sensory Capabilities

Chang

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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Two-dimensional (2D) metal–molecule hybrid frameworks have attracted great attention due to their π–d interactions for the charge–spin–lattice coupling, promising for next-generation molecular electronics. However, a high electrical conductivity is indispensable to realize such potential. Herein, we design and assemble a conductive 2D conjugated coordination thin film through an interfacial reaction between the aqueous and organic phases. Its electronic conducting properties are derived from the π–d coupling interactions to achieve an electrical conductivity of 1.05 S/cm, while the stimulus-dependent π–d interactions induce multifunctional sensory capabilities. The Co–DABDT (DABDT = 2,5-diamino-1,4-benzenedithiol dihydrochloride) thin films demonstrate an excellent performance for sensing light, strain, temperature, and humidity, as well as robust mechanical stability. The 2D frameworks with multisensing properties for real-time static and dynamic monitoring are promising for smart wearable electronic systems.

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“…[14] Very recently, robust roomtemperature ferromagnetism with T C up to 400 K has been realized in CoN 4 -embedded graphene. [15] In theoretical studies, CrI 3 [16], CrGeTe 3 [17], Fe 2 Si [10], MnS 2 [18], Fe 3 P [19], CrMoS 2 Br 2 [20], GdI 2 [21], CrN 4 C 2 [22] monolayers are predicted to be 2D ferromagnet with high Curie temperature.…”

mentioning

confidence: 99%

“…So, the dynamical and thermal stability of Mn 2 N 6 C 6 is verified. In fact, the structure of Mn 2 N 6 C 6 is similar to the MnN 4 -embedded graphene sheets, which have been synthesized in a great number and widely studied in previous theoretical and experimental works [15,[35][36][37][38][39].…”

mentioning

confidence: 99%

Achieving high-temperature ferromagnetism by means of magnetic ions dimerization

Feng,

Zhang,

Liu

et al. 2022

Preprint

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Magnetic two-dimensional materials have potential application in next-generation electronic devices and have stimulated extensive interest in condensed matter physics and material fields. However, how to realize high-temperature ferromagnetism in two-dimensional materials remains a great challenge in physics. Herein, we propose an effective approach that the dimerization of magnetic ions in two-dimensional materials can enhance the exchange coupling and stabilize the ferromagnetism. Manganese carbonitride Mn2N6C6 with a planar monolayer structure is taken as an example to clarify the method, in which two Mn atoms are gathered together to form a ferromagnetic dimer of Mn atoms and further these dimers are coupled together to form the overall ferromagnetism of the two-dimensional material. In Mn2N6C6 monolayer, the high-temperature ferromagnetism with the Curie temperature of 272.3 K is determined by solving Heisenberg model using Monte Carlo simulations method.

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Embedding atomic cobalt into graphene lattices to activate room-temperature ferromagnetism

Cited by 101 publications

References 62 publications

Two-dimensional binary transition metal nitride $M$N$_4$ ($M$ = V, Cr, Mn, Fe, Co) with a graphene-like structure and strong magnetic properties

Two-dimensional binary transition metal nitride $M$N$_4$ ($M$ = V, Cr, Mn, Fe, Co) with a graphene-like structure and strong magnetic properties

Two-Dimensional Conductive π–d Frameworks with Multiple Sensory Capabilities

Achieving high-temperature ferromagnetism by means of magnetic ions dimerization

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