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000171709 1001_ $$0P:(DE-HGF)0$$aPradheesh, R.$$b0
000171709 245__ $$aMagnetization-steps in Y$_{2}$CoMnO$_{6}$ double perovskite: The role of antisite disorder
000171709 260__ $$aMelville, NY$$bAmerican Inst. of Physics$$c2014
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000171709 520__ $$aAntisite disorder is observed to have significant impact on the magnetic properties of the double perovskite Y2CoMnO6 which has been recently identified as a multiferroic. A paramagnetic-ferromagnetic phase transition occurs in this material at Tc ≈ 75 K. At 2 K, it displays a strong ferromagnetic hysteresis with a significant coercive field of Hc ≈ 15 kOe. Sharp steps are observed in the hysteresis curves recorded below 8 K. In the temperature range 2 K ≤ T ≤ 5 K, the hysteresis loops are anomalous as the virgin curve lies outside the main loop. The field-cooling conditions as well as the rate of field-sweep are found to influence the steps. Quantitative analysis of the neutron diffraction data shows that at room temperature, Y2CoMnO6 consists of 62% of monoclinic P21/n with nearly 70% antisite disorder and 38% Pnma. The bond valence sums indicate the presence of other valence states for Co and Mn which arise from disorder. We explain the origin of steps by using a model for pinning of magnetization at the antiphase boundaries created by antisite disorder. The steps in magnetization closely resemble the martensitic transformations found in intermetallics and display first-order characteristics as revealed in the Arrott's plots.
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000171709 7001_ $$0P:(DE-Juel1)131047$$aXiao, Yinguo$$b1
000171709 7001_ $$0P:(DE-HGF)0$$aCherian, Dona$$b2
000171709 7001_ $$0P:(DE-HGF)0$$aElizabeth, Suja$$b3
000171709 7001_ $$0P:(DE-HGF)0$$aHansen, Thomas$$b4
000171709 7001_ $$0P:(DE-HGF)0$$aChatterji, Tapan$$b5
000171709 7001_ $$0P:(DE-Juel1)130572$$aBrückel, Th.$$b6
000171709 7001_ $$0P:(DE-Juel1)144543$$aNair, Harikrishnan$$b7$$eCorresponding Author
000171709 773__ $$0PERI:(DE-600)1476463-5$$a10.1063/1.4896399$$gVol. 116, no. 12, p. 123907 -$$n12$$p123907 $$tJournal of applied physics$$v116$$x1089-7550$$y2014
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