Disorder-driven spin-reorientation in multiferroic h-YMn{sub 1−x}Fe{sub x}O{sub 3}

Journal Article · Mon Jul 14 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4887809· OSTI ID:22308735

Namdeo, Sonu; Rao, S. S.; Kaushik, S. D.; Siruguri, V. ^[1]

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1. UGC-DAE-Consortium for Scientific Research, Mumbai Centre, R5 Shed, Bhabha Atomic Research Centre, Mumbai 400 085 (India)

Magnetic structure evolution of multiferroic hexagonal YMn{sub 1−x}Fe{sub x}O{sub 3} (x = 0, 0.05, and 0.1) has been studied by carrying out detailed temperature-dependent neutron diffraction at zero and 5 T fields. Thermodynamic data confirm antiferromagnetic ordering at T{sub N} in all the compositions. Our sub-T{sub N} neutron diffraction results assign the magnetic structure of pure YMnO{sub 3} to Γ{sub 1} irreducible representation. Over the perturbative-doping range, magnetic structure changes via Γ{sub 1} + Γ{sub 2} for YMn{sub 0.95}Fe{sub 0.05}O{sub 3} on to Γ{sub 2} for YMn{sub 0.9}Fe{sub 0.1}O{sub 3}, as the maiden compositional analogue of spin-reorientation; its occurrence in temperature-domain already reported for several manganites. Moreover, while the large thermal isostructural changes observed above T{sub N} are subdued in the ordered state, small alterations by the applied 5 T-field are relatively uniform across, confirming strong magneto-elastic nature of the system. Decrease of the ordered magnetic moment (μ{sub ord}) and planar magnetic frustration noted with Fe-doping is enhanced by the applied field, apparently through canting.

• OSTI ID: 22308735
• Journal Information: Journal of Applied Physics, Vol. 116, Issue 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
IRON COMPOUNDS
IRREDUCIBLE REPRESENTATIONS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MANGANESE COMPOUNDS
NEEL TEMPERATURE
NEUTRON DIFFRACTION
OXYGEN COMPOUNDS
PERTURBATION THEORY
SPIN ORIENTATION
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
YTTRIUM COMPOUNDS