Multiferroic Behavior of Gd Based Manganite

Sagar, Sadia; Joy, P.A.; Anantharaman, M. R.

doi:10.1080/00150190903412408

Cited by 7 publications

(3 citation statements)

References 22 publications

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“…Figure 1 shows the XRD pattern of the sample Gd 1−x Sr x MnO 3 . The observed peaks were indexed on the basis of an orthorhombically distorted perovskite structure (space group Pbnm), which is in agreement with previous reports [17,18].…”

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confidence: 89%

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Colossal thermoelectric power in Gd-Sr manganites

Sagar¹,

Ganesan²,

Joy³

et al. 2010

EPL

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Manganites belonging to the series Gd1−xSrxMnO3 (x = 0.3, 0.4 and 0.5) were prepared by wet solid-state reaction and their thermoelectric power was evaluated. Thermoelectric power measurements revealed a peak value at ∼40 K. All the samples exhibited a colossal thermopower at ∼40 K and in that Gd0.5Sr0.5MnO3 exhibited a maximum value of ∼35 mV/K, which is the largest reported for these class of materials at this temperature. Temperaturedependent magnetisation measurements showed that the samples exhibit a phase transition from paramagnetic to spin-glass-like state at these temperatures. Plausible mechanisms responsible for the observed colossal thermoelectric power in Gd-Sr manganites are discussed.

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confidence: 89%

“…The precursor was then calcinated in air at 900 • C overnight. The remaining powder was pressed into pellets and sintered at 1200 • C in air for 72 hrs [17]. The samples were analyzed by means of X-Ray Powder Diffractometer (Rigaku Dmax -C) using Cu-Kα radiation (λ = 1.54 Å).…”

mentioning

confidence: 99%

Colossal thermoelectric power in Gd-Sr manganites

Sagar¹,

Ganesan²,

Joy³

et al. 2010

EPL

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“…• C in air for several days (Sagar et al 2009(Sagar et al , 2010. The sample was analysed by means of X-ray Powder Diffractometer (Rigaku Dmax -C) using Cu-Kα radiation (λ = 1·5414 Å).…”

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confidence: 99%

On conduction mechanism in paramagnetic phase of Gd based manganites

Sagar

Anantharaman

2012

Bull Mater Sci

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Abstract. Materials belonging to the family of manganites are technologically important since they exhibit colossal magneto resistance. A proper understanding of the transport properties is very vital in tailoring the properties. A heavy rare earth doped manganite like Gd 0·7 Sr 0·3 MnO 3 is purported to be exhibiting unusual properties because of smaller ionic radius of Gd. Gd 0·7 Sr 0·3 MnO 3 is prepared by a wet solid state reaction method. The conduction mechanism in such a compound has been elucidated by subjecting the material to low temperature d.c. conductivity measurement. It has been found that the low band width material follows a variable range hopping (VRH) model followed by a small polaron hopping (SPH) model. The results are presented here.

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