Synthesis of magnetoresistive La0.7Sr0.3MnO3 nanoparticles by an improved chemical coprecipitation method

Synthesis and on-line ultrasonic characterisation of bulk and nanocrystalline La0.68Sr0.32MnO3 perovskite manganite

“…5. It is inferred that the observed XRD patterns of the as-prepared sample reveals a crystalline nature as reported elsewhere [8,19]. Further, XRD peaks reveal the existence of mixed crystalline nature namely rhombohedral and tetragonal crystalline phases in the as-prepared sample.…”

“…The approximate estimate of the grain size is 60 and 25 nm, respectively, for the as-prepared and sintered samples which are shown in Table 1. It is evident from the observed XRD and FTIR results, the as-prepared sample contains a mixture of crystalline structures of rhombohedral and tetragonal [8,19] and O-H stretching mode of absorbed water molecules [36]. Thus, it reveals that an agglomerate structure with approximate grain size of 60 nm.…”

“…Over the past few years, perovskite manganites R 1−x A x MnO 3 (where R trivalent rare earth elements and A divalent alkaline earth ions) were attracted for potential applications like solid oxide fuel cells, magnetic sensors/reading heads and frequency switching devices due to their unique physico-chemical [1][2][3], and giant magneto resistance (GMR) properties [4][5][6][7][8]. In perovskite magnetic materials, particularly La 0.68 Sr 0.32 MnO 3 (LSMO) perovskite, the existence of highest value of Curie temperature (T C ) and very low carrier density with a high spin polarisation of charge carriers make them very promising candidate for room temperature applications.…”

“…A variety of methods are available such as co-precipitation [8,10], sol-gel [11], hydrothermal [12], ball mill [13], spray pyrolysis [14], pulse laser deposition [15], molecular beam epitaxy [16], magnetron sputtering [17], metal-organic decomposition [18], electrochemical deposition [19] and aerosol pyrolysis [20] to prepare the nanosized LSMO perovskite materials. The sonochemical method is one of the simple techniques which are successfully employed to prepare highly pure and homogeneous nanostructured powders [19].…”

Magnetic and Magnetocaloric Properties of Pr0.8Bi0.2Fe x Mn1−x O3 Compounds with 0 ≤ x ≤ 0.3

“…One strategy to increase the Curie temperature is the doping of the perovskite-type rare earth magnates. Several methods have been used to synthesize Ln 1−x A x MnO 3 namely, coprecipitation [11][12][13], sol-gel [14], hydrothermal [15], solid-state reaction [16], and ball milling [17]. Among these methods, the sol-gel method has emerged as one of the most widely used methods for the synthesis of nanopowders.…”