Magnetic and humidity sensing properties of nanostructured CuxCo1-xFe2O4 synthesized by auto-combustion technique

Title
Magnetic and humidity sensing properties of nanostructured CuxCo1-xFe2O4 synthesized by auto-combustion technique
Authors
S. MuthuraniM. Balaji가우탐채근화D. P. PathinettamK. Asokan
Keywords
Magnetic nanomaterial; humidity sensing properties
Issue Date
2010-08
Publisher
IEEE Nano 2010 -Joint Symposium with Nano Korea 2010
Abstract
Magnetic nanomaterials of CuxCo1-xFe2O4 with the mole fraction of x = 0, 0.5 and 1 are synthesized by auto combustion method. The grain sizes of these materials are calculated from X-ray diffraction peaks and are found to be in the range of 20–70 nm. The band observed in Fourier transform infrared spectrum near 575 cm-1 in all the three samples confirm the presence of ferrite phase. Conductivity versus temperature graph shows the thermal hysteresis and it demonstrates the knee points at 475°C, 525°C and 500°C for copper ferrite, cobalt ferrite and copper-cobalt mixed ferrite respectively. The M–H loops for these materials are traced using the Vibrating Sample Magnetometer(VSM). It indicates a significant increase in the intrinsic coercivity due to the addition of Co2+ ions in copper ferrite, while the remanence and saturation magnetization are decreasing. The presence of Co2+ ions at octahedral site, are responsible for the high magnetocrystalline anisotropy (coercivity) of cobalt ferrite [1,2]. This ferrite materials exhibit good humidity sensitivity and especially copper ferrite has high sensitivity rather than other two materials
URI
http://pubs.kist.re.kr/handle/201004/39174
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KIST Publication > Conference Paper
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