Magnetic and crystal structures of Sr2IrO4: A neutron diffraction study

被引：188

作者：

Ye, Feng ^{[1
,2
]}

Chi, Songxue ^{[1
]}

Chakoumakos, Bryan C. ^{[1
]}

Fernandez-Baca, Jaime A. ^{[1
,3
]}

Qi, Tongfei ^{[2
]}

Cao, G. ^{[2
]}

机构：

[1] Oak Ridge Natl Lab, Quantum Condensed Matter Div, Oak Ridge, TN 37831 USA

[2] Univ Kentucky, Dept Phys & Astron, Ctr Adv Mat, Lexington, KY 40506 USA

[3] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 14期

基金：

美国国家科学基金会;

关键词：

POWDER DIFFRACTION;

D O I：

10.1103/PhysRevB.87.140406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report a single-crystal neutron diffraction study of the layered Sr2IrO4. 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 Sr2IrO4. The long-range antiferromagnetic order has a canted spin configuration with an ordered moment of 0.208(3) mu(B)/Ir site within the basal plane; a detailed examination of the spin canting yields 0.202(3) and 0.049(2) mu B/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. DOI: 10.1103/PhysRevB.87.140406

引用

页数：6

共 36 条

[1] Antiferromagnetic order and domains in Sr3Ir2O7 probed by x-ray resonant scattering [J].

Boseggia, S. ;

Springell, R. ;

Walker, H. C. ;

Boothroyd, A. T. ;

Prabhakaran, D. ;

Wermeille, D. ;

Bouchenoire, L. ;

Collins, S. P. ;

McMorrow, D. F. .

PHYSICAL REVIEW B, 2012, 85 (18)

[2] Magnetic structural change of Sr2IrO4 upon Mn doping [J].

Calder, S. ;

Cao, G. -X. ;

Lumsden, M. D. ;

Kim, J. W. ;

Gai, Z. ;

Sales, B. C. ;

Mandrus, D. ;

Christianson, A. D. .

PHYSICAL REVIEW B, 2012, 86 (22)

[3] Weak ferromagnetism, metal-to-nonmetal transition, and negative differential resistivity in single-crystal Sr2IrO4 [J].

Cao, G ;

Bolivar, J ;

McCall, S ;

Crow, JE ;

Guertin, RP .

PHYSICAL REVIEW B, 1998, 57 (18) :R11039-R11042

[4] The magnetic motif and the wavefunction of Kramers ions in strontium iridate (Sr2IrO4) [J].

Chapon, L. C. ;

Lovesey, S. W. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2011, 23 (25)

[5] Giant magnetoelectric effect in the Jeff=1/2 Mott insulator Sr2IrO4 [J].

Chikara, S. ;

Korneta, O. ;

Crummett, W. P. ;

DeLong, L. E. ;

Schlottmann, P. ;

Cao, G. .

PHYSICAL REVIEW B, 2009, 80 (14)

[6] Spin-orbit coupling in iridium-based 5d compounds probed by x-ray absorption spectroscopy [J].

Clancy, J. P. ;

Chen, N. ;

Kim, C. Y. ;

Chen, W. F. ;

Plumb, K. W. ;

Jeon, B. C. ;

Noh, T. W. ;

Kim, Young-June .

PHYSICAL REVIEW B, 2012, 86 (19)

[7] STRUCTURAL AND MAGNETIC STUDIES OF SR2IRO4 [J].

CRAWFORD, MK ;

SUBRAMANIAN, MA ;

HARLOW, RL ;

FERNANDEZBACA, JA ;

WANG, ZR ;

JOHNSTON, DC .

PHYSICAL REVIEW B, 1994, 49 (13) :9198-9201

[8] Neutron scattering study of correlated phase behavior in Sr2IrO4 [J].

Dhital, Chetan ;

Hogan, Tom ;

Yamani, Z. ;

de la Cruz, Clarina ;

Chen, Xiang ;

Khadka, Sovit ;

Ren, Zhensong ;

Wilson, Stephen D. .

PHYSICAL REVIEW B, 2013, 87 (14)

[9] Two-Dimensional Heisenberg Behavior of Jeff=1/2 Isospins in the Paramagnetic State of the Spin-Orbital Mott Insulator Sr2IrO4 [J].

Fujiyama, S. ;

Ohsumi, H. ;

Komesu, T. ;

Matsuno, J. ;

Kim, B. J. ;

Takata, M. ;

Arima, T. ;

Takagi, H. .

PHYSICAL REVIEW LETTERS, 2012, 108 (24)

[10] Lattice-driven magnetoresistivity and metal-insulator transition in single-layered iridates [J].

Ge, M. ;

Qi, T. F. ;

Korneta, O. B. ;

De Long, D. E. ;

Schlottmann, P. ;

Crummett, W. P. ;

Cao, G. .

PHYSICAL REVIEW B, 2011, 84 (10)

← 1 2 3 4 →