Room temperature long range ferromagnetic ordering in Ni0.58Zn0.42Co0.10Cu0.10Fe1.8O4 nano magnetic system

The structural and magnetic behavior of sol-gel autocombustion synthesized nanocrystalline Ni0.58Zn0.42Co0.10Cu0.10Fe1.8O4 have been investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), Mossbauer spectroscopy and vibrating sample magnetometer(VSM). Sample of high purity and high homogeneity was obtained by calcination at low temperature (500 degrees C) resulting in nanoparticles of average diameter similar to 15nm as determined by XRD and further confirmed by TEM. X-ray diffraction (XRD) and selective area diffraction (SAED) confirmed the single phase of the sample. Mossbauer results are supported by magnetization data. Well defined sextets and appearance of hysteresis at room temperature indicate the existence of ferromagnetic coupling at room temperature finding material utility in magnetic storage data. The existence of iron in ferric state confirmed by isomer shift is a clear evidence of improved magnetic properties of the present system.