1,437 research outputs found
Direct observation of the ground state of a 1/3 quantum magnetization plateau in SrMnPO using neutron diffraction measurements
We can directly investigate the ground state in magnetization-plateau fields
(plateau ground state) using neutron diffraction measurements. We performed
neutron diffraction measurements on the spin-5/2 trimer substance
SrMnPO in magnetization-plateau fields. The integrated
intensities of magnetic reflections calculated using an expectation value of
each spin in a plateau ground state of an isolated-trimer model agree well with
those obtained experimentally in the magnetization-plateau fields. We succeeded
in direct observation of a plateau ground state in SrMnPO
Spin transport and accumulation in the persistent photoconductor AlGaAs
Electrical spin transport and accumulation have been measured in highly Si
doped Al0.3Ga0.7As utilizing a lateral spin transport device. Persistent
photoconductivity allows for the tuning of the effective carrier density of the
channel material in situ via photodoping. Hanle effect measurements are
completed at various carrier densities and the measurements yield spin
lifetimes on the order of nanoseconds, an order of magnitude smaller than in
bulk GaAs. These measurements illustrate that this methodology can be used to
obtain a detailed description of how spin lifetimes depend on carrier density
in semiconductors across the metal-insulator transition
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