Magnetic ordering in the rhombohedral α-DyGa3.

• α-DyGa 3 single crystals were grown by the self-flux method. • The Néel temperature of α-DyGa 3 was determined to be T N ~ 7.2 K. • The magnetic structure of α-DyGa 3 is collinear antiferromagnet with k = (1/2, 0, 1/2). We have succeeded in growing α -DyGa 3 single crystals by the self-flux method and determined its magnetic structure by neutron powder diffraction. α -DyGa 3 crystallizes in the rhombohedral SrSn 3 -type structure (R 3 ̅ m , #166, hR 48), and the magnetic sublattice is comprised of staggering layers of triangular lattice of Dy. Magnetic ordering occurs below T N ~ 7.2 K with the magnetic propagation vector k = (1/2, 0, 1/2), results in an alternating stripe antiferromagnetic structure in the ab -plane described by the magnetic space group C C 2/ c (BNS #15.90, origin at (0, 0, 0)). At 3.5 K, the magnetic moment is 5.72(12) μ B per Dy3+. The Dy3+ spins are lying in basal plane and perpendicular to the b -axis. [ABSTRACT FROM AUTHOR]