ISSN:
1662-0356
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Natural Sciences in General
,
Technology
Notes:
We present extended X-ray absorption fine structure (EXAFS) and anelastic spectroscopymeasurements performed on (La0.63Ca0.37)(Mn1-yMy)O3 manganites (M = Cr or Ni and y = 0.03, 0.08).The ferromagnetic metallic phase maintains its long-range character even after Mn substitution with non-Jahn-Teller ions, but both the doping species (Ni or Cr) lower the Curie temperature and broaden themagnetic transition. EXAFS suggests the presence of distorted insulating zones in the framework of phaseinhomogeneity. Moreover, a strong dependence of the real part of the complex dynamic Young’s modulusand of the elastic energy-loss coefficient on the Mn substitution is evidenced by the anelastic spectroscopyspectra. These results confirm the correlation among local lattice disorder, dynamic and magnetic degreesof freedom and also evidence the possibility to tune manganites physical properties acting on their chemicalcomposition
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.52.110.pdf
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