Comparison of the magnetic and transport properties of Ga-, Ni-, and Fe-doped perovskite manganese oxides

Autor:	Zhi-Hong Wang, Bao-gen Shen, Wen-shan Zhan, Xin Chen, Jianwang Cai, Jinsong Chen
Rok vydání:	1999
Předmět:	Colossal magnetoresistance Materials science Condensed matter physics Doping Analytical chemistry General Physics and Astronomy chemistry.chemical_element Giant magnetoresistance Manganese Ferromagnetism chemistry Curie temperature Metal–insulator transition Perovskite (structure)
Zdroj:	Journal of Applied Physics. 86:4534-4538
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.371398
Popis:	A comparative study on magnetic and transport properties has been performed for B-site substituted perovskites La0.67Sr0.33Mn0.90B0.10O3 (B=Ga, Ni, and Fe). The doped samples show a notable decrease of the Curie Temperature, from 365 K of the undoped sample to 290 K (Ga), 292 K (Ni), and 265 K (Fe). Furthermore, the metal–semiconductor transition peaks in the doped samples shift to lower temperature, from above 300 K (undoped) to 212 K (Ga), 237 K (Ni), and 195 K (Fe). This considerable differences in magnetic and transport properties between doped and undoped samples and the diversity among the doped samples can be explained by the destruction of the partial double-exchange interactions and the exchange couplings between Mn and doped ions.
Databáze:	OpenAIRE
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