Magnetic ordering in NdMn2O5 studied by the neutron diffraction

The magnetic ordering in NdMn2O5 single crystal has been studied by the neutron scattering, including XYZ-polarization analysis. At TN≈30K the onset of the long-range magnetic order with incommensurate wave vector k=(0.5 0 ~0.36) is observed. Below 30K two magnetic phases are observed with propagati...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2014-03, Vol.354, p.85-89
Main Authors: Zobkalo, I.A., Gavrilov, S.V., Nyi, N.Z. Saw, Barilo, S.N., Shiryaev, S.V.
Format: Article
Language:English
Subjects:
Magnetic ordering
Magnetism
Mathematical analysis
Neutron diffraction
Neutron scattering
Order disorder
Phase transition
Phases
Polarized neutron
Single crystals
Vectors (mathematics)
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Summary:The magnetic ordering in NdMn2O5 single crystal has been studied by the neutron scattering, including XYZ-polarization analysis. At TN≈30K the onset of the long-range magnetic order with incommensurate wave vector k=(0.5 0 ~0.36) is observed. Below 30K two magnetic phases are observed with propagation vectors close to each other: k1=(0.5 0 kz1), k2=(0.5 0 kz2). kz1, kz2 components increase monotonously with temperature decrease down to 25K, then remain to be constant with values kz1=0.384(2), kz2=0.395(2). Two reorientation transitions were observed at ~20K and at ~5K. •The magnetic order in NdMn2O5 is non-commensurate at all temperatures of magnetic alignment.•The magnetic phase diagram of NdMn2O5is characterized by two coexisting propagation vectors k1=(0.5 0kz1), k2=(0.5 0kz2).•There are two reorientation transitions below TN=30K.•The orientation of the magnetic helicoid has significant component along c-axis at all temperatures.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2013.10.034