Physical properties of perovskite La2/3Ca1/3Mn0.90CO0.10O3-8

Ferromagnetic-paramagnetic transition was significantly affected by Mn-site substitution, however no observable changes were found in its crystal structure o f the sample. The Curie temperature strongly decreases from 267 K to 160 K for the sample of La2/3Ca1/3MnO3 and La2/3Ca1/3Mn0.90Co0.10O3-8 respectively. Especially, it ic observed that the charge-ordering appeared at 125 K. The activation energy value (Ea) has been estimated by EPR measurement as 0.093 eV. The anomaly in the thermal evolution o f the EPR linewidth has been observed also. This anomaly has been attributed to a Jahn -Teller transition or an electric phase separation. The changes of the physical properties of this sample are successfully explained by introduction the SE and antiferrom agnetic order in Co-O -M n bond.

Dữ liệu và nguồn

• TC_000886.pdf PDF

  VNU JOURNAL OF SCIENCE, Mathematics - Physics. T XX, No3AP, 2004

Thông tin khác

Miền	Giá trị
Nguồn	http://repository.vnu.edu.vn/
Tác giả	Nguyen Huy Sinh, Vu Thanh Mai, Pham Hong Quang, Nguyen Anh Tuan
Người bảo dưỡng	Đại học Quốc gia Hà Nội
Last Updated	16-08-2018 08:14:33
Được tạo ra	24-05-2018 02:32:57

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