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- W2071485293 abstract "We used polarized neutron reflectometry to determine the temperature dependence of the magnetization of thin AuFe films with 3% Fe concentration. We performed the measurements in a large magnetic field of 6 T in a temperature range from 295 to 2 K. For the films in the thickness range from 500 to 20 nm we observed a Brillouin-type behavior from 295 K down to 50 K and a constant magnetization of about $0.9{ensuremath{mu}}_{B}$ per Fe atom below 30 K. However, for the 10 nm thick film we observed a Brillouin-type behavior down to 20 K and a constant magnetization of about $1.3{ensuremath{mu}}_{B}$ per Fe atom below 20 K. These experiments are the first to show a finite-size effect in the magnetization of single spin-glass films in large magnetic fields. Furthermore, the ability to measure the deviation from the paramagnetic behavior enables us to prove the existence of the spin-glass state where other methods relying on a cusp-type behavior fail." @default.
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- W2071485293 date "2008-02-06" @default.
- W2071485293 modified "2023-09-27" @default.
- W2071485293 title "Size Effect in the Spin Glass Magnetization of Thin AuFe Films as Studied by Polarized Neutron Reflectometry" @default.
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- W2071485293 doi "https://doi.org/10.1103/physrevlett.100.057204" @default.
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