Ferroquadrupolar ordering in PrTi2Al20

Article

关键词: DOUBLET GROUND-STATE;    MAGNETIC IONS;    FIELD;    URANIUM;    PRPTBI;    CEB6;   

DOI  :  10.1103/PhysRevB.86.184419

来源: SCIE

【 摘 要 】

The origin of the nonmagnetic phase transition in PrTi2Al20, reported earlier in a macroscopic study, has been asserted microscopically using elastic and inelastic neutron scattering techniques. It has been shown spectroscopically that the crystalline-electric-field ground state is a nonmagnetic Gamma(3) doublet, whereas the excited states are two triplets (Gamma(4) and Gamma(5)) and a singlet (Gamma(1)). The diffraction experiment under external magnetic field shows that the nonmagnetic transition is indeed ferroquadrupolar ordering, which takes place as a consequence of cooperative removal of the ground-state-doublet degeneracy. It is therefore concluded that PrTi2Al20 is another rare example of Pr compounds exhibiting nonmagnetic quadrupolar order.

【 授权许可】

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