Structural, electrical, magnetic, elastic and anelastic behaviour of

✍ Scribed by K. Raju; G. Lalitha; K.V. Sivakumar; P. Venugopal Reddy

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 681 KB
• Volume: 150
• Category: Article
• ISSN: 0038-1098
• DOI: 10.1016/j.ssc.2010.02.027

✦ Synopsis

With a view to understanding the structural, electrical and magnetic, elastic and anelastic behaviour of charge ordered Nd 0.6 Ca 0.4 MnO 3 , systematic investigations were undertaken. The sample was synthesized by a sol-gel route. The sample was characterized by X-ray diffraction (XRD) using a Rietveld refinement technique and was found to have orthorhombic structure with space group Pnma. A study on the variation of electrical resistivity with temperature has been carried out in the range 100-300 K and it was found to exhibit a field induced transition. The ac susceptibility studies show two transition temperatures, which are attributed to charge ordering and a Néel transition. Internal friction and longitudinal modulus studies were carried out using the composite oscillator technique. An effort has been made to explain the observed anomalous behaviour by a qualitative model.