Observation of Two Time Scales in the Ferromagnetic ManganiteLa1−xCaxMnO3,x≈0.3

1999/10/05 by R. H. Heffner, J. E. Sonier, D. E. MacLaughlin +9 · 4 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Ferromagnetism #Laser linewidth #Magnetic and transport properties of perovskites and related materials #Manganite #Muon #Muon spin spectroscopy #Nuclear magnetic resonance #Nuclear physics #Optics #Physics #Rare-earth and actinide compounds #Relaxation (psychology) #Spin (aerodynamics) #Spins #Thermodynamics #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.85.3285

10 pages, 3 figures

arxiv created 1999/10/05 · openalex publication_date 2000/10/09 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We report new zero-field muon spin relaxation and neutron spin echo measurements in ferromagnetic (FM) (La,Ca)MnO3 which suggest at least two spatially separated regions possessing very different Mn-ion spin dynamics. One region displays diffusive relaxation, "critical slowing down" near T(C) and an increasing volume fraction below T(C), suggesting overdamped FM spin waves below T(C). The second region possesses more slowly fluctuating spins, a linewidth independent of q, and a decreasing volume fraction below T(C). The estimated length scale for the inhomogeneity is <or=30 A.

Citations

• Coexistence of localized and itinerant carriers nearTCin calcium-doped manganites
• Evolution of the Low-Frequency Spin Dynamics in Ferromagnetic Manganites

Cited by

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• The self-organised phases of manganites