Rao, SS and Tripathi, Shivam and Pandey, D and Bhat, SV (2006) Suppression of charge order, disappearance of antiferromagnetism, and emergence of ferromagnetism in Nd0.5Ca0.5MnO3 nanoparticles. In: Physical Review B, 74 (14).
e144416.pdf - Published Version
Restricted to Registered users only
Download (354Kb) | Request a copy
Nd0.5Ca0.5MnO3 nanoparticles (average diameter similar to 20 and 40 nm) are synthesized by the polymeric precursor sol-gel method and characterized by various physico-chemical techniques. Quite strikingly, in the 20 nm particles, the charge-ordered (CO) and the antiferromagnetic phases observed in the bulk below 250 K and 160 K, respectively, are completely absent. Instead, a ferromagnetic (FM) transition is observed at 95 K followed by an insulator-to-metal transition at 75 K. The 40 nm particles show a residual CO phase but a transition to the FM state also occurs, at a slightly higher temperature of 110 K.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to American Physical Society .|
|Department/Centre:||Division of Physical & Mathematical Sciences > Physics|
|Date Deposited:||03 Aug 2010 11:01|
|Last Modified:||19 Sep 2010 06:12|
Actions (login required)