1999/09/03 by S. Rosenkranz, Stephan Rosenkranz, Rosenkranz, S. +10 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Colossal magnetoresistance #Condensed matter physics #FOS: Physical sciences #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Magnetic field #Magnetoresistance #Manganite #Materials science #Multiferroics and related materials #Physics #Quantum mechanics #Spin (aerodynamics) #Strongly Correlated Electrons (cond-mat.str-el) #Thermodynamics #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/9909059
published in arXiv (Cornell University) (Cornell University) · 4 pages (RevTex), 3 embedded EPS figures
arxiv created 1999/09/03 · openalex publication_date 1999/09/03 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The spin correlations of the bilayer manganite La1.2Sr1.8Mn2O7 have been studied using neutron scattering. On cooling within the paramagnetic state, we observe purely two-dimensional behavior with a crossover to three-dimensional scaling close to the ferromagnetic transition. Below TC, an effective finite size behavior is observed. The quantitative agreement of these observations with the conventional quasi two-dimensional Kosterlitz-Thouless model indicates that the phase transition is driven by the growth of magnetic correlations, which are only weakly coupled to polarons above TC.