title: Surface spin glass behavior in sol-gel derived La0.7Ca0.3MnO3 nanotubes.
abstract: We report the fabrication of La(0.7)Ca(0.3)MnO(3) nanotubes (LCMONTs) with a diameter of about 200 nm, by a modified sol-gel method utilizing nanochannel alumina templates. High resolution transmission electron microscopy confirmed that the obtained LCMONTs are made up of nanoparticles (8-12 nm), which are randomly aligned in the wall of the nanotubes. The strong irreversibility between zero field cooling (ZFC) and field cooling (FC) magnetization curves as well as a cusplike peak in the ZFC curve gives strong support for surface spin glass behavior.
authors: Materials Research Centre, Indian Institute of Science, Bangalore, 560012, India.
authors: Satyendra
authors: S
authors: Singh
authors: S B
authors: SB
authors: Krupanidhi