Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1802878 | Journal of Magnetism and Magnetic Materials | 2006 | 4 Pages |
Abstract
We have examined magnetizations as a function of temperature and magnetic field in layered perovskite manganites La2â2xSr1+2xMn2O7 single crystals (x=0.313, 0.315, 0.318, 0.320 and 0.350) in order to determine the phase boundary between two ferromagnets (one is an uniaxial ferromagnet whose easy axis is parallel to the c-axis and the other is a planar ferromagnet whose easy axis is within the ab-plane) and following results are obtained: (i) all the present manganites exhibit magnetic transitions from a ferromagnet to a paramagnet at 76, 107, 116, 120 and 125 K for x=0.313, 0.315, 0.318, 0.320 and 0.350, respectively; (ii) for x=0.318, 0.320 and 0.350, the magnetic structure is a planar ferromagnet below Curie temperature; (iii) for x=0.313 and 0.315, the magnetic structure changes from an uniaxial to a planar ferromagnet at 66 and 85 K, respectively. From the results described above we have constructed the magnetic phase diagram of layered perovskite manganite La2â2xSr1+2xMn2O7 (0.313⩽x⩽0.350).
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Takeshi Murata, Tomoyuki Terai, Takashi Fukuda, Tomoyuki Kakeshita,