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Antiferromagnetism at T>500K in the layered hexagonal ruthenate SrRu 2 O 6

DOI: 10.1103/PhysRevB.92.104413 DOI Help

Authors: C. I. Hiley (University of Warwick) , D. O. Scanlon (University College London; Diamond Light Source) , A. A. Sokol (University College London) , S. M. Woodley (University College London) , A. M. Ganose (University College London) , S. Sangiao (Universidad de Zaragoza) , J. M. De Teresa (Universidad de Zaragoza) , P. Manuel (ISIS) , D. D. Khalyavin (ISIS Pulsed Neutron and Muon Source) , M. Walker (University of Warwick) , M. R. Lees (University of Warwick) , R. I. Walton (University of Warwick)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 92

State: Published (Approved)
Published: September 2015

Abstract: We report an experimental and computational study of the magnetic and electronic properties of the layered Ru(V) oxide SrRu2O6 (hexagonal, P31¯ m), which shows antiferromagnetic order with a Neel temperature of ´ 563(2) K, among the highest for 4d oxides. Magnetic order occurs both within edge-shared octahedral sheets and between layers and is accompanied by anisotropic thermal expansivity that implies strong magnetoelastic coupling of Ru(V) centers. Electrical transport measurements using focused-ion-beam–induced deposited contacts on a micron-scale crystallite as a function of temperature show p-type semiconductivity. The calculated electronic structure using hybrid density functional theory successfully accounts for the experimentally observed magnetic and electronic structure, and Monte Carlo simulations reveal how strong intralayer as well as weaker interlayer interactions are a defining feature of the high-temperature magnetic order in the material.

Subject Areas: Physics

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Added On: 06/01/2016 12:41

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