Macroscopic Properties in Incommensurate Magnetic Ordered Phases of PrB_6 in Magnetic Field around the <111> Direction(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

概要

論文の詳細を見る
We measured the thermal expansion and magnetostriction of PrB_6 under the longitudinal magnetic fields up to 15T for three magnetic field directions. We found the following results in the IC1 and IC2 phases for H ‖<111>. The magnetostriction shows only a small magnetic field dependence in the IC1 phase but exhibits a large shrinkage with increasing magnetic field roughly proportional to -H^2 in the IC2 phase. The thermal expansion exhibits a small change in the IC1 phase but a large increase in the IC2 phase with decreasing temperature. These different behaviors between the IC1 and IC2 phases originate from the existence of both χ_‖ and χ_⊥ components exist in the IC1 phase and only the χ_⊥ component in the IC2 phase. The characteristic magnetic and magnetoelastic properties of the experimental results are reproduced by the simple calculation for the two sublattice model, although this model does not represent the incommensurate magnetic strucutres of PrB_6. The important point is the weight of χ_‖ and χ_⊥ components which determines the macroscopic properties such as the magnetization, magnetostriction and thermal expansion.
一般社団法人日本物理学会の論文
2006-01-15