resumo
The perovskite-type calcium manganite exhibits interesting magnetic properties that can be tuned and enhanced by the laser floating zone (LFZ) method. This work explores, for the first time, the application of an external magnetic field during the LFZ growth of CaMn0.9Gd0.1O3. The effects of the field direction on structural, microstructural, electrical and magnetic properties of the as-grown samples are evidenced, being observed an improvement on grain alignment and the magnetization (31.22 emu/g for 5 T at 5 K), when samples are grown under an external magnetic field in the growth direction, while the magnetic field applied in opposite direction a small improvement is observed. The results prospects to applied this process to other oxide systems for tuning their magnetic properties.
categoria
Materials Science; Physics
autores
Marques, G; Valente, MA; Kovalevsky, AV; Costa, FM; Ferreira, NM
nossos autores
Andrei Kavaleuski
Investigador principal
Nuno Miguel Freitas Ferreira
Bolseiro de pós-DoutoramentoProjectos
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Collaboratory for Emerging Technologies, CoLab (EMERGING TECHNOLOGIES)
agradecimentos
The authors are grateful to i3N (LA/P/0037/2020, UID-B/50025/2020 and UID-P/50025/2020) and CICECO-Aveiro Institute of Materials (UIDB/50011/2020 and UIDP/50011/2020) , financed by COMPETE 2020 Program and national funds through the FCT/MEC and FEDER under the PT2020 Partnership Agreement. This work is funded by national funds (OE) , through FCT - Fundacao para a Ciencia e a Tecnologia, I.P., in the scope of the framework contract foreseen in the numbers 4, 5 and 6 of the article 23, of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19.