Metastable antiphase boundary ordering in CaFe2O4

H. Lane, E. E. Rodriguez, H. C. Walker, Ch Niedermayer, U. Stuhr, R. I. Bewley, D. J. Voneshen, M. A. Green, J. A. Rodriguez-Rivera, P. Fouquet, S. -W. Cheong, J. P. Attfield, R. A. Ewings, C. Stock

Research output: Contribution to journalArticlepeer-review


CaFe2O4 is an S=5/2 antiferromagnet exhibiting two magnetic orders that shows regions of coexistence at some temperatures. Using a Green's function formalism, we model neutron scattering data of the spin wave excitations in this material, elucidating the microscopic spin Hamiltonian. In doing so, we suggest that the low-temperature A phase order (↑⏐↑⏐⏐↓⏐↓) finds its origins in the freezing of antiphase boundaries created by thermal fluctuations in a parent B phase order (↑⏐⏐↓↑⏐⏐↓). The low-temperature magnetic order observed in CaFe2O4 is thus the result of a competition between the exchange coupling along c, which favors the B phase, and the single-ion anisotropy, which stabilizes thermally generated antiphase boundaries, leading to static metastable A phase order at low temperatures.
Original languageEnglish
Article number104404
Pages (from-to)1-15
Number of pages15
JournalPhysical Review B
Issue number10
Publication statusPublished - 2 Sep 2021


  • cond-mat.str-el


Dive into the research topics of 'Metastable antiphase boundary ordering in CaFe2O4'. Together they form a unique fingerprint.

Cite this