This title appears in the Scientific Report :
2010
Please use the identifier:
http://dx.doi.org/10.1088/0953-8984/22/34/346002 in citations.
Memory effect in Dy0.5Sr0.5MnO3 single crystals
Memory effect in Dy0.5Sr0.5MnO3 single crystals
We have performed a series of magnetic aging experiments on single crystals of Dy(0.5)Sr(0.5)MnO(3). The results demonstrate striking memory and chaos-like effects in this insulating half-doped perovskite manganite and suggest the existence of strong magnetic relaxation mechanisms of a clustered mag...
Saved in:
Personal Name(s): | Harikrishnan, S. |
---|---|
Rößler, S. / Kumar, C. M. N. / Xiao, Y. / Bhat, H. L. / Rößler, U. K. / Steglich, F. / Wirth, S. / Elizabeth, S. | |
Contributing Institute: |
JCNS; JCNS JARA-FIT; JARA-FIT Neutronenstreuung; IFF-5 Streumethoden; IFF-4 |
Published in: | Journal of physics / Condensed matter, 22 (2010) S. 346002 |
Imprint: |
Bristol
IOP Publ.
2010
|
Physical Description: |
346002 |
PubMed ID: |
21403267 |
DOI: |
10.1088/0953-8984/22/34/346002 |
Document Type: |
Journal Article |
Research Program: |
BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) |
Series Title: |
Journal of Physics: Condensed Matter
22 |
Subject (ZB): | |
Publikationsportal JuSER |
We have performed a series of magnetic aging experiments on single crystals of Dy(0.5)Sr(0.5)MnO(3). The results demonstrate striking memory and chaos-like effects in this insulating half-doped perovskite manganite and suggest the existence of strong magnetic relaxation mechanisms of a clustered magnetic state. The spin-glass-like state established below a temperature T(sg)≈ 34 K originates from quenched disorder arising due to the ionic-radii mismatch at the rare earth site. However, deviations from the typical behavior seen in canonical spin glass materials are observed which indicate that the glassy magnetic properties are due to cooperative and frustrated dynamics in a heterogeneous or clustered magnetic state. In particular, the microscopic spin flip time obtained from dynamical scaling near the spin glass freezing temperature is four orders of magnitude larger than microscopic times found in atomic spin glasses. The magnetic viscosity deduced from the time dependence of the zero-field-cooled magnetization exhibits a peak at a temperature T < T(sg) and displays a marked dependence on waiting time in zero field. |