Zeitschriftenartikel:
S. Giblin, P. Freeman, K. Hradil, D. Prabhakaran, A. Boothroyd:
"Spin reorientation and glassy dynamics in La1.55Sr0.45NiO4";
Physical Review B,
78
(2008),
18;
S. 184423-1
- 184423-9.
Kurzfassung englisch:
The magnetism of charge-stripe-ordered La1.55Sr0.45NiO4 was studied by a combination of neutron diffraction, muon-spin relaxation (μSR), and bulk susceptibility. Long-range magnetic ordering was observed at a lower temperature by μSR than by neutron diffraction, consistent with a glassy transition to the ordered phase. A second magnetic transition is detected by all techniques and is consistent with a spin reorientation. On cooling below TSR=42 K the spins reorientate from lying 32.9±0.6° away from the stripe direction at 70 K to 56.8±0.4° at 10 K. The magnetic order was observed by neutron diffraction to have both three-dimensional and two-dimensional (without any correlation along the c axis) characters. μSR measurements confirmed this and are consistent with a single magnetically ordered spin-stripe phase. The effects of checkerboard charge order on the ordered phase and the characteristics of the phase diagram of the spin reorientation in charge-ordered La2−xSrxNiO4 are commented on.
Schlagworte:
71.27.+a, 75.25.+z, 76.75.+i
"Offizielle" elektronische Version der Publikation (entsprechend ihrem Digital Object Identifier - DOI)
http://dx.doi.org/10.1103/PhysRevB.78.184423
Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.