Junaid, Bushiri M; Vinod, R; Sajan, P; Sreekumar, Rajappan Achary; Vicente, Muñoz-Sanjosé(Wiley, February 11, 2014)
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Abstract:
The magnetic properties of Mn-doped ZnO (ZnO:Mn) nanorods
grown by hydrothermal process at a temperature of 200 8C
and a growth time of 3 h have been studied. The samples were
characterized by using powder X-ray diffraction with Rietveld
refinement, scanning electron microscopy, energy-dispersive
X-ray analysis and SQUID magnetometry. Mn (3 wt%) and
(5 wt%)-doped ZnO samples exhibit paramagnetic and
ferromagnetic behavior, respectively, at room temperature.
The spin-glass behavior is observed from the samples with
respect to the decrease of temperature. At 10 K, both samples
exhibit a hysteresis loop with relatively low coercivity. The
room-temperature ferromagnetism in 5 wt% Mn-doped ZnO
nanorods is attributed to the increase in the specific area of grain
boundaries, interaction between dopant Mn2þ ions substituted
at Zn2þ site and the interaction between Mn2þ ions and Zn2þ
ions from the ZnO host lattice
Description:
Phys. Status Solidi A 211, No. 5, 1155–1161 (2014)