Magnetic and Electrical Transport Properties of Ln0.8Sr0.2(Co1—xFex)O3 (Ln = La, Nd, Sm, Eu, 0.03 ≤ x ≤ 0.12)
✍ Scribed by Solovykh, T. K. ;Troyanchuk, I. O. ;Khalyavin, D. D. ;Szymczak, H. ;Piotrowski, K.
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 177 KB
- Volume
- 172
- Category
- Article
- ISSN
- 0031-8965
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✦ Synopsis
Electrical transport and magnetic behavior of the perovskite system Ln 0X8 Sr 0X2 (Co 1Àx Fe x )O 3 , where Ln = La, Nd, Sm, Eu; x 0.12 is reported. It is shown that both substitutions of lanthanium by rare-earth ions and cobalt by iron lead to the destruction of ferromagnetic ordering and an increase of the magnetoresistance. The La 0X8 Sr 0X2 (Co 1Àx Fe x )O 3 (x 0.06) compounds exhibit a met-al±insulator transition near the Curie temperature whereas rare-earth perovskites are semiconductors. In contrast to previous reports on the La 0X8 Sr 0X2 (Co 1Àx Fe x )O 3 system we did not observe large magnetoresistance above 77 K.