Enhancement of Spin Correlation in Cr2O3 Film Above Néel Temperature Induced by Forming a Junction With Fe2O3 Layer: First-Principles and Monte-Carlo Study

Magnetics, IEEE Transactions （2014）

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摘要

We propose an approach to enhance the antiferromagnetic spin correlation in the Cr2O3 film by forming a junction with the Fe2O3 layer. First-principles calculations and Monte-Carlo simulations were performed to evaluate the exchange coupling constant between the Cr and Fe spin and the spin correlation functions of the Fe2O3/Cr2O3 bilayer system in a finite temperature. We found that above the Néel temperature of Cr2O3, the length of the antiferromagnetic spin correlation in the bilayer system is increased by more than twice as that of the bulk system.

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关键词

Heisenberg model,Monte Carlo methods,Neel temperature,ab initio calculations,antiferromagnetic materials,chromium compounds,exchange interactions (electron),iron compounds,magnetic thin films,magnetoelectric effects,Cr2O3-Fe2O3,Cr2O3-Fe2O3 layer junction,Monte Carlo method,Neel temperature,antiferromagnetic spin correlation enhancement,bilayer system,exchange coupling constant,film,finite temperature,first-principles calculation,Classical Heisenberg model,Cr2O3,Fe2O3,Monte-Carlo simulation,first-principles calculation,spin correlation

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