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Finite-size effect of antiferromagnetic transition and electronic structure in LiFePO_4

机译:LiFePO_4中反铁磁跃迁和电子结构的有限尺寸效应

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摘要

The finite-size effect on the antiferromagnetic (AF) transition and electronic configuration of iron has been observed in LiFePO_4. Determination of the scaling behavior of the AF transition temperature (T_N) versus the particle-size dimension (L) in the critical regime 1 -(T_N(L))/(T_N(∞)) ~ L~(-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 LiFePO_4 is found to be sensitive to the particle size. An alternative structural view based on the polyatomic ion groups of PO_4~(3-) is proposed.
机译:在LiFePO_4中已观察到对铁的反铁磁(AF)跃迁和电子构型的有限尺寸效应。在临界状态1-(T_N(L))/(T_N(∞))〜L〜(-1)中,AF转变温度(T_N)与颗粒尺寸(L)的结垢行为的确定表明: AF指令的激活性质很大程度上取决于表面能。此外,发现反映LiFePO_4中铁的电子构型的有效磁矩对粒度敏感。提出了基于PO_4〜(3-)的多原子离子基团的替代结构图。

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