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Publication Detail
Magnetic behaviour in Dy(1-x)Mm(x)Co(2) compounds
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Srinivas G, Ellerby M, Skipper NT, Ramaprabhu S, Sankaranarayanan V
  • Publisher:
    IOP PUBLISHING LTD
  • Publication date:
    03/11/2010
  • Journal:
    J PHYS-CONDENS MAT
  • Volume:
    22
  • Issue:
    43
  • Print ISSN:
    0953-8984
  • Language:
    EN
  • Keywords:
    ITINERANT-ELECTRON METAMAGNETISM, LAVES PHASE-COMPOUNDS, RARE-EARTH, INTERMETALLIC COMPOUNDS, PHYSICAL-PROPERTIES, CO SUBLATTICE, SUBSTITUTION, ALLOYS, HYDRIDES, FIELD
  • Addresses:
    Srinivas, G
    UCL
    London Ctr Nanotechnol
    Dept Phys & Astron
    London
    WC1H 0AH
    England
Abstract
The magnetic behaviour in Dy(1-x)Mm(x)Co(2) (x = 0, 0.1, 0.2, 0.3, 0.4, and 0.5; Mm = mischmetal) compounds is reported using temperature and field dependence of magnetization (M-T and M-H respectively) measurements. A strong composition dependent irreversibility is observed in both the M-T and M-H scans below the magnetic ordering temperature (T-C). A clear change of the first-order magnetic transition of DyCo2 to a second-order one in Dy(0.5)Mm(0.5)Co(2) is evidenced by M-T and a series of Arrott (M-2 versus H/M) plots, obtained from the M-H isotherms around T-C. The variation in induced moments of the Co sublattice is estimated. It is found that the Mm substitution can only lead to a considerable reduction in the T-C, saturation magnetization, and Co moment. The observed behaviour of M-T and M-H plots with increasing Mm content is discussed in detail.
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