Field-induced evolution of magnetic ordering in the quantum spin system (CuBr)Sr2Nb3O10with a

Abstract

'Field-induced evolution of magnetic ordering in the quantum spin system (CuBr)Sr2Nb3O10 with a magnetization plateau ' Physical Review B, vol. 88, no. 10, 104401. DOI: 10.1103 General rightsCopyright for the publications made accessible via the Edinburgh Research Explorer is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights. Take down policyThe University of Edinburgh has made every reasonable effort to ensure that Edinburgh Research Explorer content complies with UK legislation. If you believe that the public display of this file breaches copyright please contact openaccess@ed.ac.uk providing details, and we will remove access to the work immediately and investigate your claim. The field-induced evolution of the magnetic ordering in (CuBr)Sr 2 Nb 3 O 10 with a 1 /3 magnetization plateau has been investigated by neutron diffraction under magnetic fields up to 10 T. With an increasing magnetic field, the zero-field helical antiferromagnetic (AFM) phase, AF1, with κ = [0 3 /8 1 /2] is replaced by a simple ferromagnetic phase with κ = [0 0 0], the formation of which is, however, retarded by the appearance of a second AFM, AF2, with κ = [0 1 /3 ∼ 0.46]. Upon further increasing of the magnetic field, the AF2 phase disappears and only the ferromagnetic phase persists. The results clearly show that the magnetization plateau, induced by the competition between field-induced ferromagnetic, F, and AF2 phases, is coincidentally situated at M = 1 /3 M S of the dc magnetization curve. The AF1 and AF2 phases have strongly differing magnetic propagation vectors and are therefore not directly related.

Magnetic spiral order in the square-lattice spin system (CuBr)Sr2Nb3O10

“…In the present communication we verify the mentioned assumption, we show that the experimental properties of (CuBr)Sr 2 Nb 3 O 10 [13][14][15] are well reproduced within the limits of quantum S = 1/2 J 1 −J 2 −J 3 Heisenberg model on the square lattice.…”

“…The aim of the present work is to describe the experimental data for the layered square-lattice compound (CuBr)Sr 2 Nb 3 O 10 [13][14][15]. This appears to be particular case of the general picture of J 1 − J 2 − J 3 model thermodynamic properties.…”

“…Hereinafter we address quasi-two-dimensional compound with stacked square lattice magnetic planes (CuBr)Sr 2 Nb 3 O 10 . Neutron scattering experiment [13,14] indicates helical spin order in this substance, while DMI-based explanation is unacceptable (inversion symmetry is preserved). This dyad brings forth the assumption to describe the magnetic order via J 1 − J 2 − J 3 Heisenberg model [13,14].…”