Synthesis and magnetic properties of single-crystalline Na2-xMn8O16 nanorods
1 Nanjing National Laboratory of Microstructures and Department of Physics, Nanjing University, 22 Hankou Road, Nanjing, 210093, China
2 Department of Physics, Hohai University, 1 Xikang Road, Nanjing, 210098, China
3 College of Physics and Electronic Information, Luoyang Normal College, 71 Longmen Road, Luoyang, 471022, Henan, China
Nanoscale Research Letters 2011, 6:133 doi:10.1186/1556-276X-6-133Published: 11 February 2011
The synthesis of single-crystalline hollandite-type manganese oxides Na2-xMn8O16 nanorods by a simple molten salt method is reported for the first time. The nanorods were characterized by powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and a superconducting quantum interference device magnetometer. The magnetic measurements indicated that the nanorods showed spin glass behavior and exchange bias effect at low temperatures. The low-temperature magnetic behaviors can be explained by the uncompensated spins on the surface of the nanorods.