Gerhard Gritzner, Manfred Enengl, Oliver Heiml, Markus Kühberger, Andrzej Kolodziejczyk, Z. Tarnawski, A. Kozlowski, J. Chmist, R. Zalecki, M. Wasniowska, K. Krop, J. Przewoznik, J. Zukrowski, E. Japa,
"Materials with collosal magnetoresistance and related oxides"
: Proceedings from the Review Seminar on Scientific Cooperation between Austria and Poland, 1-2002, ISBN: 83-88443-75-5, Materials with collosal magnetoresistance and related oxides, G. Gritzner, M. Enengl, O. Heiml, M. Kühberger, A. Kolodziejczyk, Z. Tarnawski, A. Kozlowski, J. Chmist, R. Zalecki, M. Wasniowska, K. Krop, J. Przewoznik, J. Zukrowski, E. Japa, Physics and Material Science (Proceedings from the Review Seminar on Scientific Cooperation between Austria and Poland)1 (2001) 40 ISBN 83-88443-75-5
Original Titel:
Materials with collosal magnetoresistance and related oxides
Sprache des Titels:
Englisch
Original Buchtitel:
Proceedings from the Review Seminar on Scientific Cooperation between Austria and Poland
Original Kurzfassung:
Samples of La0.67Ca0.33(FexMn1-x)O3 with x = 0.01, 0.03, 0.06, 0.1 and 0.15 and of (La0.67-xYxCa0.33)MnO3 with x = 0.0 and 0.07 were prepared by calcination and sintering of stoichiometric amounts of La, Y and Fe oxides as well as Mn and Ca carbonate. The specimen of La0.67Ca0.33(FexMn1-x)O3 were phase pure with respect to XRD. Increasing iron contents increased the resistivity of the specimen. Resistance versus temperature curves were obtained in self-field.
The magneto-resistance and specific heats as a function of the temperature and of the magnetic field of the manganese perovskites La0.67-xYxCa0.33MnO3 with x = 0.0 and 0.07 have been measured within the temperature interval from 80 K to 300 K. The pronounced maximum of the magneto-resistance with its maximum value as high as about 30 % and specific heat jump have been observed at 250 K and 150 K for x = 0 and x = 0.07, respectively, as a result of phase transition from metallic-ferromagnetic to insulating-paramagnetic state with increasing temperature.
Sprache der Kurzfassung:
Englisch
Englische Kurzfassung:
Samples of La0.67Ca0.33(FexMn1-x)O3 with x = 0.01, 0.03, 0.06, 0.1 and 0.15 and of (La0.67-xYxCa0.33)MnO3 with x = 0.0 and 0.07 were prepared by calcination and sintering of stoichiometric amounts of La, Y and Fe oxides as well as Mn and Ca carbonate. The specimen of La0.67Ca0.33(FexMn1-x)O3 were phase pure with respect to XRD. Increasing iron contents increased the resistivity of the specimen. Resistance versus temperature curves were obtained in self-field.
The magneto-resistance and specific heats as a function of the temperature and of the magnetic field of the manganese perovskites La0.67-xYxCa0.33MnO3 with x = 0.0 and 0.07 have been measured within the temperature interval from 80 K to 300 K. The pronounced maximum of the magneto-resistance with its maximum value as high as about 30 % and specific heat jump have been observed at 250 K and 150 K for x = 0 and x = 0.07, respectively, as a result of phase transition from metallic-ferromagnetic to insulating-paramagnetic state with increasing temperature.
Erscheinungsmonat:
1
Erscheinungsjahr:
2002
Notiz zum Zitat:
Materials with collosal magnetoresistance and related oxides, G. Gritzner, M. Enengl, O. Heiml, M. Kühberger, A. Kolodziejczyk, Z. Tarnawski, A. Kozlowski, J. Chmist, R. Zalecki, M. Wasniowska, K. Krop, J. Przewoznik, J. Zukrowski, E. Japa, Physics and Material Science (Proceedings from the Review Seminar on Scientific Cooperation between Austria and Poland)1 (2001) 40 ISBN 83-88443-75-5
Forschungs-