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Title: The effect of surface and interface on Neel transition temperature of low-dimensional antiferromagnetic materials
Authors: Zhang, Wen
Zhou, Zhaofeng
Zhong, Yuan
Zhang, Ting
Huang, Yongli
Sun, Changqing
Keywords: Chemical bonds
Interface structure
Exchange interactions
Antiferromagnetic materials
Issue Date: 2015
Source: Zhang, W., Zhou, Z., Zhong, Y., Zhang, T., Huang, Y., & Sun, C. (2015). The effect of surface and interface on Neel transition temperature of low-dimensional antiferromagnetic materials. AIP Advances, 5(11), 117228.
Series/Report no.: AIP Advances
Abstract: 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 epitaxialinterface. 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.
ISSN: 2158-3226
DOI: 10.1063/1.4936250
Schools: School of Electrical and Electronic Engineering 
Rights: © 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License. []
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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