Incommensurate Magnetic Structure in the Cubic Noncentrosymmetric Ternary Compound Pr5Ru3Al2.

Magnetic susceptibility and neutron powder diffraction experiments have been performed on the noncentrosymmetric ternary compound Pr₅Ru₃Al₂. The previously reported ferromagnetic transition at 24K was not detected in our improved-quality samples. Instead, magnetic ordering was observed in the DC magnetic susceptibility at T_c ≃ 3:8 K. The neutron powder diffraction experiment further indicates that an incommensurate magnetic structure is established below T_c with the magnetic modulation vector q ≃ (066; 0:066; 0:066) (r.l.u.). A candidate for the magnetic structure is proposed using representation analysis. [ABSTRACT FROM AUTHOR]