Dzyaloshinskii-Moriya interaction and the magnetic ground state in magnetoelectric LiCoPO4

Ellen Fogh; Oksana Zaharko; Jürg Schefer; Christof Niedermayer; Sonja Holm-Dahlin; Michael Korning Sørensen; Andreas Bott Kristensen; Niels Hessel Andersen; David Vaknin; Niels Bech Christensen; Rasmus Toft-Petersen

doi:10.1103/PhysRevB.99.104421

Dzyaloshinskii-Moriya interaction and the magnetic ground state in magnetoelectric LiCoPO₄

Ellen Fogh^*, Oksana Zaharko, Jürg Schefer, Christof Niedermayer, Sonja Holm-Dahlin, Michael Korning Sørensen, Andreas Bott Kristensen, Niels Hessel Andersen, David Vaknin, Niels Bech Christensen, Rasmus Toft-Petersen

^*Corresponding author for this work

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Abstract

Magnetic structures are investigated by means of neutron diffraction to shine a light on the intricate details that are believed to be key to understanding the magnetoelectric effect in LiCoPO₄. At zero field, a spontaneous spincanting of ϕ = 7(1)° is found. The spins tilt away from the easy b-axis toward c. Symmetry considerations lead to the magnetic point group m'_z, which is consistent with the previously observed magnetoelectric tensorform and weak ferromagnetic moment along b. For magnetic fields applied along a, the induced ferromagnetic moment couples via the Dzyaloshinskii-Moriya interaction to yield an additional field-induced spin canting. An upper limitto the size of the interaction is estimated from the canting angle.

Original language	English
Article number	104421
Journal	Physical Review B
Volume	99
Issue number	10
Number of pages	8
ISSN	1098-0121
DOIs	https://doi.org/10.1103/PhysRevB.99.104421
Publication status	Published - 2019

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title = "Dzyaloshinskii-Moriya interaction and the magnetic ground state in magnetoelectric LiCoPO4",

abstract = "Magnetic structures are investigated by means of neutron diffraction to shine a light on the intricate details that are believed to be key to understanding the magnetoelectric effect in LiCoPO4. At zero field, a spontaneous spincanting of ϕ = 7(1)° is found. The spins tilt away from the easy b-axis toward c. Symmetry considerations lead to the magnetic point group m'z, which is consistent with the previously observed magnetoelectric tensorform and weak ferromagnetic moment along b. For magnetic fields applied along a, the induced ferromagnetic moment couples via the Dzyaloshinskii-Moriya interaction to yield an additional field-induced spin canting. An upper limitto the size of the interaction is estimated from the canting angle.",

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T1 - Dzyaloshinskii-Moriya interaction and the magnetic ground state in magnetoelectric LiCoPO4

AU - Fogh, Ellen

AU - Zaharko, Oksana

AU - Schefer, Jürg

AU - Niedermayer, Christof

AU - Holm-Dahlin, Sonja

AU - Sørensen, Michael Korning

AU - Kristensen, Andreas Bott

AU - Andersen, Niels Hessel

AU - Vaknin, David

AU - Christensen, Niels Bech

AU - Toft-Petersen, Rasmus

PY - 2019

Y1 - 2019

N2 - Magnetic structures are investigated by means of neutron diffraction to shine a light on the intricate details that are believed to be key to understanding the magnetoelectric effect in LiCoPO4. At zero field, a spontaneous spincanting of ϕ = 7(1)° is found. The spins tilt away from the easy b-axis toward c. Symmetry considerations lead to the magnetic point group m'z, which is consistent with the previously observed magnetoelectric tensorform and weak ferromagnetic moment along b. For magnetic fields applied along a, the induced ferromagnetic moment couples via the Dzyaloshinskii-Moriya interaction to yield an additional field-induced spin canting. An upper limitto the size of the interaction is estimated from the canting angle.

AB - Magnetic structures are investigated by means of neutron diffraction to shine a light on the intricate details that are believed to be key to understanding the magnetoelectric effect in LiCoPO4. At zero field, a spontaneous spincanting of ϕ = 7(1)° is found. The spins tilt away from the easy b-axis toward c. Symmetry considerations lead to the magnetic point group m'z, which is consistent with the previously observed magnetoelectric tensorform and weak ferromagnetic moment along b. For magnetic fields applied along a, the induced ferromagnetic moment couples via the Dzyaloshinskii-Moriya interaction to yield an additional field-induced spin canting. An upper limitto the size of the interaction is estimated from the canting angle.

U2 - 10.1103/PhysRevB.99.104421

DO - 10.1103/PhysRevB.99.104421

M3 - Journal article

SN - 1098-0121

VL - 99

JO - Physical Review B

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