Behr, Dylan;
Delmonte, Davide;
Gilioli, Edmondo;
Khalyavin, Dmitry D;
Johnson, Roger D;
(2022)
Weak ferromagnetism and spin reorientation in antiferroelectric BiCrO3.
Physical Review B: Condensed Matter and Materials Physics
, 106
(2)
, Article 024416. 10.1103/PhysRevB.106.024416.
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Abstract
BiCrO3 is an antiferroelectric perovskite known to exhibit an unconventional spin reorientation transition between antiferromagnetic structures, accompanied by a large jump in weak ferromagnetism. Using a combination of neutron powder diffraction, magnetometry, and symmetry analysis, we confirm the dominant G-type antiferromagnetic order below TN = 111 K and identify the magnetic phase transition with a spontaneous rotation of Cr3+ moments from the b axis to a particular direction in the ac plane. We demonstrate the role of antiferroelectric displacements produced by the Bi3+ lone-pair electrons and octahedral rotations in establishing spin canting via the antisymmetric Dzyaloshinskii-Moriya interaction. This mechanism results in weak ferromagnetism above and below the spin-reorientation and explains the dramatic increase in net magnetization on cooling.
| Type: | Article |
|---|---|
| Title: | Weak ferromagnetism and spin reorientation in antiferroelectric BiCrO3 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevB.106.024416 |
| Publisher version: | https://doi.org/10.1103/PhysRevB.106.024416 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Technology, Physical Sciences, Materials Science, Multidisciplinary, Physics, Applied, Physics, Condensed Matter, Materials Science, Physics, MAGNETIC-PROPERTIES, CRYSTAL |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10153866 |
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