Neutron diffraction, muon-spin rotation, and high magnetic field investigation of the multiferroic antiferromagnetic quantum spin-chain system CuCrO$_4$
Multiferroic behavior in the linear-chain spin S=1/2 compound CuCrO4 was proposed to appear due to competing nearest- and next-nearest-neighbor exchange interactions along the chain. Here, we report on our study of the long-range magnetic ordering using powder neutron diffraction and muon-spin rotation measurements. Consistently, both methods find incommensurate long-range antiferromagnetic ordering below 8.5(3) K. We determined the magnetic structure from neutron powder diffraction patterns based on the propagation vector →τ=(0,0,0.546(1)). At 1.9 K, the magnetic moment of Cu2+ was refined to 0.48(2) μB. The Cu moments form a helicoidal spir…(more)
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%0 Journal Article
%1 PhysRevB.107.184442
%A Law, J. M.
%A Luetkens, H.
%A Pascua, G.
%A Hansen, Th.
%A Glaum, R.
%A Wang, Z.-S.
%A Wosnitza, J.
%A Kremer, R. K.
%D 2023
%I American Physical Society
%J Phys. Rev. B
%K b
%N 18
%P 184442
%R 10.1103/PhysRevB.107.184442
%T Neutron diffraction, muon-spin rotation, and high magnetic field investigation of the multiferroic antiferromagnetic quantum spin-chain system CuCrO$_4$
%U https://link.aps.org/doi/10.1103/PhysRevB.107.184442
%V 107
%X Multiferroic behavior in the linear-chain spin S=1/2 compound CuCrO4 was proposed to appear due to competing nearest- and next-nearest-neighbor exchange interactions along the chain. Here, we report on our study of the long-range magnetic ordering using powder neutron diffraction and muon-spin rotation measurements. Consistently, both methods find incommensurate long-range antiferromagnetic ordering below 8.5(3) K. We determined the magnetic structure from neutron powder diffraction patterns based on the propagation vector →τ=(0,0,0.546(1)). At 1.9 K, the magnetic moment of Cu2+ was refined to 0.48(2) μB. The Cu moments form a helicoidal spiral with an easy plane coinciding with the equatorial planes of the Jahn-Teller elongated CuO6 octahedra. Low-temperature high magnetic field measurements of the magnetization and the dielectric polarization show the multiferroic phase to extend up to ∼25 T, after which a new, yet unknown phase appears. Full saturation of the magnetic moment is expected to occur at fields much beyond 60 T.
@article{PhysRevB.107.184442,
abstract = {Multiferroic behavior in the linear-chain spin S=1/2 compound CuCrO4 was proposed to appear due to competing nearest- and next-nearest-neighbor exchange interactions along the chain. Here, we report on our study of the long-range magnetic ordering using powder neutron diffraction and muon-spin rotation measurements. Consistently, both methods find incommensurate long-range antiferromagnetic ordering below 8.5(3) K. We determined the magnetic structure from neutron powder diffraction patterns based on the propagation vector →τ=(0,0,0.546(1)). At 1.9 K, the magnetic moment of Cu2+ was refined to 0.48(2) μB. The Cu moments form a helicoidal spiral with an easy plane coinciding with the equatorial planes of the Jahn-Teller elongated CuO6 octahedra. Low-temperature high magnetic field measurements of the magnetization and the dielectric polarization show the multiferroic phase to extend up to ∼25 T, after which a new, yet unknown phase appears. Full saturation of the magnetic moment is expected to occur at fields much beyond 60 T.},
added-at = {2023-08-07T08:08:08.000+0200},
author = {Law, J. M. and Luetkens, H. and Pascua, G. and Hansen, Th. and Glaum, R. and Wang, Z.-S. and Wosnitza, J. and Kremer, R. K.},
biburl = {https://www.bibsonomy.org/bibtex/2a8c985b8938b51d8eb04c6e664f313ea/ctqmat},
day = 30,
description = {Phys. Rev. B 107, 184442 (2023) - Neutron diffraction, muon-spin rotation, and high magnetic field investigation of the multiferroic antiferromagnetic quantum spin-chain system ${\mathrm{CuCrO}}_{4}$},
doi = {10.1103/PhysRevB.107.184442},
interhash = {63b2af1c4251ce394891eb112f5f0950},
intrahash = {a8c985b8938b51d8eb04c6e664f313ea},
journal = {Phys. Rev. B},
keywords = {b},
month = {05},
number = 18,
numpages = {9},
pages = 184442,
publisher = {American Physical Society},
timestamp = {2023-10-18T10:55:43.000+0200},
title = {Neutron diffraction, muon-spin rotation, and high magnetic field investigation of the multiferroic antiferromagnetic quantum spin-chain system CuCrO$_{\mathbf{4}}$},
url = {https://link.aps.org/doi/10.1103/PhysRevB.107.184442},
volume = 107,
year = 2023
}