TY - JOUR
T1 - Magnetic and crystal structures of Sr2IrO4
T2 - A neutron diffraction study
AU - Ye, Feng
AU - Chi, Songxue
AU - Chakoumakos, Bryan C.
AU - Fernandez-Baca, Jaime A.
AU - Qi, Tongfei
AU - Cao, G.
PY - 2013/4/22
Y1 - 2013/4/22
N2 - We report a single-crystal neutron diffraction study of the layered Sr 2IrO4. This work unambiguously determines the magnetic structure of the system and reveals that the spin orientation rigidly tracks the staggered rotation of the IrO6 octahedra in Sr2IrO 4. The long-range antiferromagnetic order has a canted spin configuration with an ordered moment of 0.208(3) μB/Ir site within the basal plane; a detailed examination of the spin canting yields 0.202(3) and 0.049(2) μB/site for the a axis and the b axis, respectively. It is intriguing that forbidden nuclear reflections of space group I4 1/acd are also observed in a wide temperature range from 4 K to 600 K, which suggests a reduced crystal structure symmetry. This neutron-scattering work provides a direct, well-refined experimental characterization of the magnetic and crystal structures that are crucial to the understanding of the unconventional magnetism exhibited in this unusual magnetic insulator.
AB - We report a single-crystal neutron diffraction study of the layered Sr 2IrO4. This work unambiguously determines the magnetic structure of the system and reveals that the spin orientation rigidly tracks the staggered rotation of the IrO6 octahedra in Sr2IrO 4. The long-range antiferromagnetic order has a canted spin configuration with an ordered moment of 0.208(3) μB/Ir site within the basal plane; a detailed examination of the spin canting yields 0.202(3) and 0.049(2) μB/site for the a axis and the b axis, respectively. It is intriguing that forbidden nuclear reflections of space group I4 1/acd are also observed in a wide temperature range from 4 K to 600 K, which suggests a reduced crystal structure symmetry. This neutron-scattering work provides a direct, well-refined experimental characterization of the magnetic and crystal structures that are crucial to the understanding of the unconventional magnetism exhibited in this unusual magnetic insulator.
UR - https://www.scopus.com/pages/publications/84877031056
U2 - 10.1103/PhysRevB.87.140406
DO - 10.1103/PhysRevB.87.140406
M3 - Article
AN - SCOPUS:84877031056
SN - 1098-0121
VL - 87
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 14
M1 - 140406
ER -