Giant magnetoresistance in La1-xCaxMnO3 ceramics and thin films

• Type: Article in International Scientific Journal
• Date: 1997

Authors

araújo, joão pedro (Author) Other; tavares, pedro b. (Author) Other; amaral, v. s. (Author) FCUP; lourenço, a. a c s (Author) Other; sousa, joão bessa (Author) FCUP; vieira, joaquim manuel (Author) Other

Journal

Title: Key Engineering Materials

Pages: 1412-1415

ISSN: 1013-9826

Publisher: Trans Tech Publications Ltd

Indexing

ISI Web of Knowledge

Scopus - 1 Citation

Other information

Authenticus ID: P-007-DFJ

Abstract (EN): We prepared bulk ceramics and thin films in the La1-xCaxMnO3 system. The ceramics (x=0.25, 0.33) were prepared by standard techniques with a final sintering at 1300°C. The thin films were prepared on MgO (100) substrates by excimer laser ablation, using the bulk material as a target, and by aerosol-assisted MOCVD. In both methods a substrate temperature of 630°C was necessary to promote epitaxial growth. The bulk materials and the thin films presented a ferromagnetic phase transition, associated with a maximum of resistance as a function of temperature. For x=0.25 we obtained maximum magnetoresistances of 65% (T=240 K) and 45% (T=210K) at 9 kOe for the bulk and laser ablated thin film respectively. © 1997 Trans Tech Publications.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4