Magnetic Structure of Phase II in U(Ru0.96Rh0.04)(2)Si-2 Determined by Neutron Diffraction under Pulsed High Magnetic Fields

作者：Kuwahara K^*; Yoshii S; Nojiri H; Aoki D; Knafo W; Duc F; Fabreges X; Scheerer G W; Frings P; Rikken G L J A; Bourdarot F; Regnault L P; Flouquet J

来源：Physical Review Letters, 2013, 110(21): 216406.

DOI：10.1103/PhysRevLett.110.216406

We report neutron diffraction measurements on U(Ru0.96Rh0.04)(2)Si-2 single crystal under pulsed high magnetic fields up to 30 T applied along the tetragonal c axis. The high-field experiments revealed that the field-induced phase II above 26 T corresponds to a commensurate up-up-down ferrimagnetic structure characterized by the wave vector q = (2/3, 0, 0) with the magnetic moments parallel to the c axis, which naturally explains the one-third magnetization plateau and the substantially changed Fermi surface in phase II. This a-axis modulated magnetic structure indicates that the phase II near the hidden order phase is closely related to the characteristic incommensurate magnetic fluctuations at Q(1) = (0.6, 0, 0) in the pure system URu2Si2, in contrast to the pressure-induced antiferromagnetic order at Q(0) = (1, 0, 0).

• 出版日期2013-5-23
• 单位中国地震局