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Advances in Condensed Matter Physics
Volume 2013 (2013), Article ID 714143, 6 pages
Research Article

Magnetic and Electric Properties of , ( ) Layered Perovskites

A. I. Ali1,2 and A. Hassen3,4

1Energy Harvest-Storage Research Center and Department of Physics, University of Ulsan, Ulsan 680-749, Republic of Korea
2Basic Science Department, Faculty of Industrial Education, Helwan University, Saray El-Quba, Cairo, Egypt
3Department of Physics, Faculty of Science, Fayoum University, El Fayoum 63514, Egypt
4Department of Physics, Faculty of Science and Education, Taif University, 21985 Al Khurma, Saudi Arabia

Received 27 January 2013; Accepted 20 March 2013

Academic Editor: Jan Alexander Jung

Copyright © 2013 A. I. Ali and A. Hassen. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The electric and magnetic properties of layered perovskites have been investigated systematically over the doping range . It was found that both Sr1.5Y0.5CoO4 and Sr1.4Y0.6CoO4 undergo ferromagnetic (FM) transition around 145 K and 120 K, respectively. On the other hand, Sr1.3Y0.7CoO4 and Sr1.2Y0.8CoO4 compounds showed paramagnetic behavior over a wide range of temperatures. In addition, spin-glass transition ( ) was observed at 10 K for Sr1.3Y0.7CoO4. All investigated samples are semiconducting-like within the temperature range of 10–300 K. The temperature dependence of the electrical resistivity, , was described by two-dimensional variable range hopping (2D-VRH) model at 50 K < ≤ 300 K. Comparison with other layered perovskites was discussed in this work.