Discontinuous transition effects in manganites: magnetization study in the paramagnetic phase

• Type: Article in International Scientific Journal
• Date: 2002

Authors

Amaral, V. S. (Author) Other; Araújo, João Pedro (Author) FCUP; Pogorelov, Yu G. (Author) FCUP; Tavares, Pedro B. (Author) Other; Sousa, João Bessa (Author) FCUP; Vieira, Joaquim Manuel (Author) Other

Journal

Title: Journal of Magnetism and Magnetic Materials

Vol. 242

Pages: 655-658

ISSN: 0304-8853

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 24 Citations

Scopus - 25 Citations

Other information

Authenticus ID: P-000-PWB

DOI: 10.1016/s0304-8853(01)01046-0

Abstract (EN): The magnetization M(H,T) of La-based manganites in the paramagnetic phase is studied. La-0.67,Ca0.33MnO3, La0.8MnO3 and La0.60Y0.07Ca0.33MnO3 ferromagnetic metals show first-order phase transition features near T-C with maxima in dM/dH and kinks in H/M vs. T. Such effects are absent in ferromagnetic insulator La0.6Cd0.25MnO3. Results are analyzed with a Landau energy expansion up to sixth power in M and the anomalies related with the electronic condensation and magneto-elastic energies coupling to the magnetic degree of freedom.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4