Abstract
Temperature and magnetic field dependent magnetic properties of La2Ni1−xCoxMnO6 (0≤x≤ 1) nanoparticles prepared by sol–gel method with average particle size ∼25–60nm have been investigated. X-ray diffraction and Raman spectra study have revealed the suppression of structural disorder with the increase of Co content. Magnetic ordering and magnetization properties like, transition temperature (TC), coercive field (HC) and spontaneous magnetization (MS) increases with the Co substitution at the Ni site. The inverse magnetic susceptibility above TC has shown a broad temperature regime with a downward deviation from the Curie–Weiss law, a characteristic feature of Griffiths-like phase. This temperature regime of magnetic inhomogeneity decreases with the increase of Co content and completely absent for La2CoMnO6.
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