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57Fe Mössbauer study of La0.67Ca0.33Mn1 − x Fe x O3 CMR system

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Abstract

Fe-doped polycrystalline samples La0.67Ca0.33Fe x Mn1 − x O3 (x = 0%, 5%, 7.5%, 10% and 15%) are studied employing 57Fe Mössbauer effect measurements. The room temperature Mössbauer measurements of all the samples indicate the presence of Fe + 3 state and it is observed that the quadrupole splitting remains constant up to 10% Fe doping and increases with 15% Fe doping. Resistivity data shows increasing insulating behaviour with Fe doping and insulating region follows Efros–Shlovskii variable range hoping model.

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Author notes

  1. T. G. Reddy

    Present address: Indiana University Cyclotron Facility, 2401, Milo B. Sampson Lane, Bloomington, IN, 47408, USA

Authors and Affiliations

  1. UGC-DAE Consortium for Scientific Research, Khandwa Road, Indore, 452 017, India

    V. Raghavendra Reddy, R. Rawat, T. G. Reddy & Ajay Gupta

  2. Department of Physics, University College of Science, Osmania University, Hyderabad, 500 007, India

    P. Y. Reddy & K. Rama Reddy

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  1. V. Raghavendra Reddy
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  2. R. Rawat
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  3. T. G. Reddy
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Correspondence to V. Raghavendra Reddy.

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Reddy, V.R., Rawat, R., Reddy, T.G. et al. 57Fe Mössbauer study of La0.67Ca0.33Mn1 − x Fe x O3 CMR system. Hyperfine Interact 187, 109–115 (2008). https://doi.org/10.1007/s10751-008-9890-7

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