Phys. Rev. Lett. 100, 217201 (2008) [4 pages]Nature of Ho Magnetism in Multiferroic HoMnO3Received 11 January 2008; published 29 May 2008 Using x-ray resonant magnetic scattering and x-ray magnetic circular dichroism, techniques that are element specific, we have elucidated the role of Ho3+ in multiferroic HoMnO3. In zero field, Ho3+ orders antiferromagnetically with moments aligned along the hexagonal c direction below 40 K, and undergoes a transition to another magnetic structure below 4.5 K. In applied electric fields of up to 1×107 V/m, the magnetic structure of Ho3+ remains unchanged. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.217201
DOI:
10.1103/PhysRevLett.100.217201
PACS:
75.25.+z, 75.50.Ee, 75.80.+q, 77.80.−e
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