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- W2034505745 abstract "The magnetic properties of γ-Fe2O3 nanoclusters grown within the microdomains of optically transparent block copolymer films were investigated. SQUID magnetometry and 57Fe Mössbauer spectroscopy were employed with characteristic measurement times of 100 s and 10−8 s, respectively. The observed magnetism of the ca. 5 nm diameter particles was dominated by quantum-size effects, collective magnetic excitations, and superparamagnetic relaxation processes associated with the sub-magnetic domain γ-Fe2O3 nanoclusters. The combination of these two techniques allowed determination of the values of the magnetic anisotropy constant (K = 1.58 × 105J/m3) and the pre-exponential factor (τ0 = 4.2 × 10−12s) which determine the magnetic behavior of the nanocomposites. At low temperatures, the nanocomposite films exhibited hysteresis with the saturated coercivity, Hc0, equal to 530 Oe." @default.
- W2034505745 created "2016-06-24" @default.
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- W2034505745 date "1998-02-01" @default.
- W2034505745 modified "2023-10-17" @default.
- W2034505745 title "Magnetic properties of iron oxide nanoclusters within microdomains of block copolymers" @default.
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- W2034505745 doi "https://doi.org/10.1016/s0304-8853(97)00675-6" @default.
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