Materials with collosal magnetoresistance and related oxides

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

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

Institute of Chemical Technology of Inorganic Materials

Research output: Chapter in Book/Report/Conference proceeding › Conference proceedings

Abstract

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.

Original language	English
Title of host publication	Proceedings from the Review Seminar on Scientific Cooperation between Austria and Poland
Number of pages	2
Publication status	Published - Jan 2002

Fields of science

104005 Electrochemistry
104006 Solid state chemistry
104014 Surface chemistry
104017 Physical chemistry
105113 Crystallography
105116 Mineralogy
503013 Subject didactics of natural sciences
204 Chemical Process Engineering
204001 Inorganic chemical technology
205016 Materials testing
210006 Nanotechnology
211104 Metallurgy

Cite this

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title = "Materials with collosal magnetoresistance and related oxides",

abstract = "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.",

author = "Gerhard Gritzner and Manfred Enengl and Oliver Heiml and Markus K{\"u}hberger and Andrzej Kolodziejczyk and Z. Tarnawski and A. Kozlowski and J. Chmist and R. Zalecki and M. Wasniowska and K. Krop and J. Przewoznik and J. Zukrowski and E. Japa",

year = "2002",

month = jan,

language = "English",

isbn = "83-88443-75-5",

booktitle = "Proceedings from the Review Seminar on Scientific Cooperation between Austria and Poland",

}

TY - GEN

T1 - Materials with collosal magnetoresistance and related oxides

AU - Gritzner, Gerhard

AU - Enengl, Manfred

AU - Heiml, Oliver

AU - Kühberger, Markus

AU - Kolodziejczyk, Andrzej

AU - Tarnawski, Z.

AU - Kozlowski, A.

AU - Chmist, J.

AU - Zalecki, R.

AU - Wasniowska, M.

AU - Krop, K.

AU - Przewoznik, J.

AU - Zukrowski, J.

AU - Japa, E.

PY - 2002/1

Y1 - 2002/1

N2 - 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.

AB - 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.

M3 - Conference proceedings

SN - 83-88443-75-5

BT - Proceedings from the Review Seminar on Scientific Cooperation between Austria and Poland

ER -