The effect of surface and interface on Neel transition temperature of low-dimensional antiferromagnetic materials | Zendy

Wen Zhang | Zendy; Zhaofeng Zhou | Zendy; Yuan Zhong | Zendy; Ting Zhang | Zendy; Yongli Huang | Zendy; Chang Q. Sun | Zendy

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The effect of surface and interface on Neel transition temperature of low-dimensional antiferromagnetic materials

Author(s) -

Wen Zhang,

Zhaofeng Zhou,

Yuan Zhong,

Ting Zhang,

Yongli Huang,

Chang Q. Sun

Publication year - 2015

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4936250

Subject(s) - antiferromagnetism , nanomaterials , néel temperature , condensed matter physics , ising model , bond length , materials science , bond energy , chemistry , chemical physics , nanotechnology , crystallography , magnetization , molecule , physics , crystal structure , magnetic field , organic chemistry , quantum mechanics

Incorporating the bond order-length-strength (BOLS) notion with the Ising premise, we have modeled the size dependence of the Neel transition temperature (TN) of antiferromagnetic nanomaterials. Reproduction of the size trends reveals that surface atomic undercoordination induces bond contraction, and interfacial hetero-coordination induces bond nature alteration. Both surface and interface of nanomaterials modulate the TN by adjusting the atomic cohesive energy. The TN is related to the atomic cohesive/exchange energy that is lowered by the coordination number (CN) imperfection of the undercoordinated atoms near the surface and altered by the changed bond nature of epitaxial interface. A numerical match between predictions and measurements reveals that the TN of antiferromagnetic nanomaterials declines with reduced size and increases with both the strengthening of heterogeneous bond and the increase of the bond number

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