On the Spin-Lattice Relaxation Process in Ferromagnets
نویسندگان
چکیده
منابع مشابه
Simple theory for spin-lattice relaxation in metallic rare-earth ferromagnets.
The spin-lattice relaxation time τ SL is a key quantity both for the dynam-ical response of ferromagnets excited by laser pulses and as the speed limit of magneto-optical recording. Extending the theory for the electron param-agnetic resonance of magnetic impurities to spin-lattice relaxation in ferro-magnetic rare earths we calculate τ SL for Gd and find a value of 48 ps in very good agreement...
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The deuterium spin-lattice relaxation time, 7",, of H 2 0 /D 2 0 mixtures is measured at 298.2 K. The relaxation rate, Ff 1 , is found to increase with increasing deuterium atom fraction, n, the plot of T\ 1 vs. n exhibiting a small depature from linearity. A general equation Tf 1 (n) for the H 2 0 / DiO system is formulated. The temperature dependence of Tx is investigated in the temperature r...
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We use single-cycle THz fields and the femtosecond magneto-optical Kerr effect to, respectively, excite and probe the magnetization dynamics in two thin-film ferromagnets with different lattice structures: crystalline Fe and amorphous CoFeB. We observe Landau-Lifshitz-torque magnetization dynamics of comparable magnitude in both systems, but only the amorphous sample shows ultrafast demagnetiza...
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NMR experiments at very low temperatures have been carried out for a long time, generally not as a general purpose method for analyzing structure and dynamics but rather as a convenient diagnostic tool in the study of substances whose special properties at very low temperatures are of interest. These include most prominently solid hydrogen and solid and liquid helium-3. It must always have been...
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The spin-lattice relaxation times F, ('H) and 7, (l9F) in CoSiF6 • 6H-.0 have been measured at 30 MHz in the tem perature range 150K^F^400 K Both F,('H) and r, (l9F) decrease sharply at the phase transition tempera ture of 246 K (cooling cycle). The main relaxation mecha nism is assumed to be an Orbach process. From the 7", data an average splitting of the Co2+ ground state of about 400 cm"1...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1957
ISSN: 0033-068X
DOI: 10.1143/ptp.18.552