Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2002-10-17
Journal of Magnetism and Magnetic Materials 250, L6-L11 (2002)
Physics
Condensed Matter
Strongly Correlated Electrons
11 pages of text 2 pages Figs
Scientific paper
10.1016/S0304-8853(02)00382-7
Pr0.9Sr0.1CoO2.99 sample exhibits magnetoresistivity (MR) of up to 40 % at 5 K with a strong hysteresis/memory effect. Magnetisation measurements on Pr0.9Sr0.1CoO2.99 in an applied field of 100 Oe show that, as temperature decreases, the zero-field-cooled (ZFC) and field-cooled (FC) magnetisation curves branch clearly at 50 K, and a cusp appears in the ZFC branch at Tcusp 20 K. Magnetisation measurements in various fields between 100 and 10,000 Oe show that both the ZFC-FC branching temperature and, Tcusp, decrease with increasing field. The magnetization-field isotherms at 5 and 10 K show hysteresis loops typical of ferromagnets. No appreciable MR is seen in this compound at 50 K, i.e. at a temperature close to ZFC-FC branching temperature. At 20 K, negative MR of above 16% is observed without any hysteresis effect. We believe that the appearance of a ferromagnetic component at 5 K and 10 K (i.e. at temperatures below Tcusp) within the spin glass state of Co spins is responsible for both large MR and the prominent hysteresis/memory effect in MR.
Awana* V. P. S.
Karppinen Maarit
Malik* S. K.
Nakamura Jin
Yamauchi Hidetaka
No associations
LandOfFree
Glass component induced hysteresis/memory effect in magnetoresistance of ferromagnetic Pr0.9Sr0.1CoO2.99 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Glass component induced hysteresis/memory effect in magnetoresistance of ferromagnetic Pr0.9Sr0.1CoO2.99, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Glass component induced hysteresis/memory effect in magnetoresistance of ferromagnetic Pr0.9Sr0.1CoO2.99 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-671297