Title :
Ultrafast optical and far-infrared studies of La/sub 0:7/Ca/sub 0:3/MnO/sub 3/: mixed-phase dynamics
Author :
Averitt, R.D. ; Thorsmolle, V.K. ; Jia, Q.X. ; Lim, D. ; Calgaro, F. ; Trugman, S.A. ; Taylor, A.J.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
Abstract :
Summary form only given. We present ultrafast all-optical pump-probe and complementary optical-pump terahertz-probe measurements that are suggestive of mixed-phase dynamics in the nominally ferromagnetic metal state of colossal magnetoresistive thin films.
Keywords :
calcium compounds; electron-phonon interactions; ferromagnetic materials; lanthanum compounds; magnetic thin films; metal-insulator transition; mixed valence compounds; optical conductivity; photoexcitation; spin-lattice relaxation; time resolved spectra; La/sub 0.7/Ca/sub 0.3/MnO/sub 3/; colossal magnetoresistive films; far-infrared conductivity; ferromagnetic metal state; mixed-phase dynamics; mixed-valence manganites; optical-pump terahertz-probe measurements; optically induced changes; photoexcitation; spin-lattice relaxation; thermally disordered phonons; transient conductivity; two-component relaxation; ultrafast all-optical pump-probe measurements; Calcium compounds; Electrons; Ferromagnetic materials; Lanthanum compounds; Magnetic films; Phonons;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2002. QELS '02. Technical Digest. Summaries of Papers Presented at the
Conference_Location :
Long Beach, CA, USA
Print_ISBN :
1-55752-708-3
DOI :
10.1109/QELS.2002.1031327
