Finite-size effect of antiferromagnetic transition and electronic structure in LiFePO4

TL;DR

This study investigates how finite particle size influences the antiferromagnetic transition temperature and electronic structure in LiFePO4, revealing size-dependent magnetic and electronic properties and proposing a new structural perspective.

Contribution

It provides a detailed analysis of finite-size effects on AF transition and electronic configuration in LiFePO4, including scaling behavior and surface energy influence.

Findings

AF transition temperature scales with particle size as L^-1

Effective magnetic moment varies with particle size

Surface energy impacts AF ordering nature

Abstract

The finite-size effect on the antiferromagnetic (AF) transition and electronic configuration of iron has been observed in LiFePO4. Determination of the scaling behavior of the AF transition temperature (TN) versus the particle-size dimension (L) in the critical regime 1-TN(L)/TN(XTL)\simL^-1 reveals that the activation nature of the AF ordering strongly depends on the surface energy. In addition, the effective magnetic moment that reflects the electronic configuration of iron in LiFePO4 is found to be sensitive to the particle size. An alternative structural view based on the polyatomic ion groups of (PO4)3- is proposed.