First-order multi-k phase transitions and magnetoelectric effects in multiferroic Co3TeO6
2012 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 85, no 21, 214439- p.Article in journal (Refereed) Published
A theoretical description of the sequence of magnetic phases in Co3TeO6 is presented. The strongly first-order character of the transition to the commensurate multiferroic ground state, induced by coupled order parameters corresponding to different wave vectors, is related to a large magnetoelastic effect with an exchange energy critically sensitive to the interatomic spacing. The monoclinic magnetic symmetry C2' of the multiferroic phase permits spontaneous polarization and magnetization as well as the linear magnetoelectric effect. The existence of weakly ferromagnetic domains is verified experimentally by second harmonic generation measurements.
Place, publisher, year, edition, pages
2012. Vol. 85, no 21, 214439- p.
Physical Sciences Engineering and Technology
Research subject Engineering Science with specialization in Solid State Physics
IdentifiersURN: urn:nbn:se:uu:diva-177860DOI: 10.1103/PhysRevB.85.214439ISI: 000305782800004OAI: oai:DiVA.org:uu-177860DiVA: diva2:541601