Crystal field excitations and magnons: Their roles in oxyselenides $\mathrm{P}{\mathrm{r}}_{2}{\mathrm{O}}_{2}{M}_{2}{\mathrm{OSe}}_{2}\phantom{\rule{0.16em}{0ex}}(M=\mathrm{Mn},\phantom{\rule{0.16em}{0ex}}\mathrm{Fe})$

Crystal field excitations and magnons: Their roles in oxyselenides $P r_{2} O_{2} M_{2} {OSe}_{2} (M = Mn, Fe)$

R. K. Oogarah, C. P. J. Stockdale, C. Stock, J. S. O. Evans, A. S. Wills, J. W. Taylor, and E. E. McCabe

Phys. Rev. B 95, 174441 – Published 30 May 2017

Abstract

We present the results of neutron scattering experiments to study the crystal and magnetic structures of the Mott-insulating transition metal oxyselenides $P r_{2} O_{2} M_{2} {OSe}_{2} (M = Mn, Fe)$ . The structural role of the non-Kramers $P r^{3 +}$ ion was investigated, and analysis of $P r^{3 +}$ crystal field excitations was performed. Long-range order of $P r^{3 +}$ moments in $P r_{2} O_{2} F e_{2} {OSe}_{2}$ can be induced by an applied magnetic field.

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Received 25 October 2016
Revised 31 March 2017

DOI:https://doi.org/10.1103/PhysRevB.95.174441

Physics Subject Headings (PhySH)

Antiferromagnetism Crystal structure Electronic structure Frustrated magnetism Magnetic anisotropy Magnetic interactions Magnetic phase transitions Metamagnetism

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

R. K. Oogarah¹, C. P. J. Stockdale², C. Stock², J. S. O. Evans³, A. S. Wills⁴, J. W. Taylor⁵, and E. E. McCabe^1,*

¹School of Physical Sciences, Ingram Building, University of Kent, Canterbury, Kent, United Kingdom
²School of Physics and Astronomy, University of Edinburgh, Edinburgh, EH9 3JZ, United Kingdom
³Department of Chemistry, Durham University, Lower Mountjoy, South Road, Durham, DH1 3LE, United Kingdom
⁴Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, United Kingdom
⁵ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, United Kingdom

^*e.e.mccabe@kent.ac.uk

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Vol. 95, Iss. 17 — 1 May 2017

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Physical Review B

covering condensed matter and materials physics

Crystal field excitations and magnons: Their roles in oxyselenides $P r_{2} O_{2} M_{2} {OSe}_{2} (M = Mn, Fe)$

R. K. Oogarah, C. P. J. Stockdale, C. Stock, J. S. O. Evans, A. S. Wills, J. W. Taylor, and E. E. McCabe

Phys. Rev. B 95, 174441 – Published 30 May 2017

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Physical Review B

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Crystal field excitations and magnons: Their roles in oxyselenides Pr2O2M2OSe2(M=Mn,Fe)

R. K. Oogarah, C. P. J. Stockdale, C. Stock, J. S. O. Evans, A. S. Wills, J. W. Taylor, and E. E. McCabe

Phys. Rev. B 95, 174441 – Published 30 May 2017

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Crystal field excitations and magnons: Their roles in oxyselenides $P r_{2} O_{2} M_{2} {OSe}_{2} (M = Mn, Fe)$