7 research outputs found
COMMERCIAL SWEETPOTATO PRODUCTION IN MISSISSIPPI
This report provides an estimate of selected costs incurred in sweetpotato production in Mississippi, 1999. Land, management and general farm overhead costs were not included. Per acre returns above specified costs are estimated at approximately $1,100.00 per acre.sweetpotatoes, production costs, net returns, cash flow, price sensitivity, equipment, chemicals, Production Economics,
Irreversible transformation of ferromagnetic ordered stripe domains in single-shot IR pump - resonant X-ray scattering probe experiments
The evolution of a magnetic domain structure upon excitation by an intense,
femtosecond Infra-Red (IR) laser pulse has been investigated using single-shot
based time-resolved resonant X-ray scattering at the X-ray Free Electron laser
LCLS. A well-ordered stripe domain pattern as present in a thin CoPd alloy film
has been used as prototype magnetic domain structure for this study. The
fluence of the IR laser pump pulse was sufficient to lead to an almost complete
quenching of the magnetization within the ultrafast demagnetization process
taking place within the first few hundreds of femtoseconds following the IR
laser pump pulse excitation. On longer time scales this excitation gave rise to
subsequent irreversible transformations of the magnetic domain structure. Under
our specific experimental conditions, it took about 2 nanoseconds before the
magnetization started to recover. After about 5 nanoseconds the previously
ordered stripe domain structure had evolved into a disordered labyrinth domain
structure. Surprisingly, we observe after about 7 nanoseconds the occurrence of
a partially ordered stripe domain structure reoriented into a novel direction.
It is this domain structure in which the sample's magnetization stabilizes as
revealed by scattering patterns recorded long after the initial pump-probe
cycle. Using micro-magnetic simulations we can explain this observation based
on changes of the magnetic anisotropy going along with heat dissipation in the
film.Comment: 16 pages, 6 figure
COMMERCIAL SWEETPOTATO PRODUCTION IN MISSISSIPPI
This report provides an estimate of selected costs incurred in sweetpotato production in Mississippi, 1999. Land, management and general farm overhead costs were not included. Per acre returns above specified costs are estimated at approximately $1,100.00 per acre