Ferromagnetic Y2CoMnO6: Spin-Glass-Like Behavior and Dielectric Relaxation

Enhanced magnetic coercivity and maximum energy product in double‐perovskite Y2CoMnO6single crystals

“…Double perovskites of RE 2 CoMnO 6 (RE = La, …, Lu) display assorted physical properties such as metamagnetism , reentrant spin‐glass state , magnetocaloric effect and multiferroicity due to various magnetic interactions and ionic valences/antisite disorders between mixed‐valent magnetic ions . RE 2 CoMnO 6 crystallizes in a monoclinic perovskite structure (space group P2 1 /n) with alternating Co 2+ and Mn 4+ ions in corner‐shared oxygen octahedral .…”

Effect of Preparation Conditions on Magnetic and Dielectric Properties of Y2MMnO6 (M = Co, Ni)

“…and A 2 MM′O 6 (R = rare‐earth or alkaline‐earth ions; M and M′ = 3d transition‐metal ions) type perovskites have been receiving significant attention due to their wide varieties of magnetic and dielectric properties . The observation of large magnetocapacitance near ambient temperature in La 2 CoMnO 6 revived the interest in the dielectric properties of transition metal‐containing perovskites . A large number of perovskites with lighter rare‐earth ions have been investigated in literature, while analogous studies on the heavier rare‐earth ions are limited due to the preferential formation of hexagonal YMnO 3 ‐related structures.…”

“…A number of studies indicate coexistence of ferroelectric and ferromagnetic properties in several of A 2 MM′O 6 type rare‐earth perovskites . The A 2 MM′O 6 type compositions with lighter rare‐earth ions form cation‐disordered lattices where the dielectric and magnetic properties depend significantly on the sample preparation conditions . Studies on La 2 NiMnO 6 composition show coexistence of monoclinic and rhombohedral phases, and their fraction depend strongly on the sample preparation temperature and atmosphere .…”

“…Similar to the magnetic properties, the dielectric properties of transition‐metal ion‐containing perovskites have also been widely investigated in the aim of magnetodielectric or multiferroic properties. Zhang et al have attributed a low temperature dielectric relaxation to dipolar relaxation in a charge‐ordered structure of Y 2 CoMnO 6 while they have observed a spin‐glass‐like magnetic properties in it. Frequency‐ and temperature‐dependent dielectric measurements of La 2 MMnO 6 , where M = Ni and Co, indicated relaxor‐like dielectric properties .…”

“…Zhang et al have attributed a low temperature dielectric relaxation to dipolar relaxation in a charge‐ordered structure of Y 2 CoMnO 6 while they have observed a spin‐glass‐like magnetic properties in it. Frequency‐ and temperature‐dependent dielectric measurements of La 2 MMnO 6 , where M = Ni and Co, indicated relaxor‐like dielectric properties . Recent studies indicate that the relaxor‐like behavior of such perovskites are significantly affected by the annealing conditions, like temperature or atmosphere .…”