Issue 29, 2013

Morphology control of YMn2O5nanocrystals by hydrothermal synthesis and their magnetic properties

Abstract

Single-crystalline YMn2O5 was successfully synthesized through a tunable hydrothermal route. The pH value of the growth solution was a crucial factor for the control of the size and morphology of YMn2O5. A low pH value led to the formation of nanorods. Both the final size of the nanocrystals and their aspect ratio increased drastically with decreasing pH value. A relatively high temperature and low metallic salt concentrations favored the formation of one-dimensional nano-crystalline YMn2O5. Magnetic measurement indicated the crystalline YMn2O5 showed a weak ferromagnetic ordering, which was explained by uncompensated spins at the surface. The magnetic susceptibility indicates that the ferromagnetic transition temperature increases from 39 to 42 K with increasing grain size from 80 to 600 nm. With the decrease in the particle size, the coercivity increases while the exchange bias decreases.

Graphical abstract: Morphology control of YMn2O5 nanocrystals by hydrothermal synthesis and their magnetic properties

Article information

Article type
Paper
Submitted
08 Apr 2013
Accepted
24 Apr 2013
First published
25 Apr 2013

RSC Adv., 2013,3, 11888-11894

Morphology control of YMn2O5 nanocrystals by hydrothermal synthesis and their magnetic properties

Y. Mei and S. Wu, RSC Adv., 2013, 3, 11888 DOI: 10.1039/C3RA41671B

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