Investigation of size-dependent magnetic ordering in charge ordered antiferromagnetic nanoparticles via magnetocaloric effect

We have detected size-dependent modifications in magnetic ordering in charge ordered nanoparticles through the study of magnetocaloric effect. Due to prominent surface induced magnetism in nanoparticles, it is very difficult to probe the magnetic ordering in charge ordered antiferromagnetic nanoparticles from direct magnetization study, especially at lower magnetic fields, though at higher magnetic fields the antiferromagnetic/charge ordered transition can be visualized properly. We show that, at comparatively lower magnetic fields, the magnetocaloric effect provides a sensitive way for the detection of such ordering transitions.