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- W2023849936 abstract "A SQUID-based micromagnetic susceptometer [1,2] has been used to determine the magnetic susceptibility of 248Cm metal in the temperature range 4.2–320 K and in the applied magnetic field range of 0.45–1400 G. X-ray diffraction indicated that two of the samples of mass 37.2 and 41.2 μg exhibit the dhcp phase and one of mass 152 μg the fcc structure. The nominally dhcp samples exhibit an antiferromagnetic transition at ≈ 65 K. A small second transition near 200 K is observed and influences the high temperature Curie-Weiss fit to the data. For 270 K < T < 307 K and an applied field of 1200 G, x = C/(T + θ), with C = Nμ2/3k and μ = 5.5 μB, θ = −176 K. The fcc sample exhibits a ferrimagnetic transition in the neighborhood of 200 K and at low temperature has a saturated magnetic moment per atom of 0.4 Bohr magnetons in applied fields above 1200 G. At high temperatures three interpretations of the susceptibility may be made. 1.(a) Two regions of Curie-Weiss behavior x = C/(T + θ) with C = Nμ2/3k. For 200 K < T < 300 K, μ = 6.2 μB, θ = −202 K. For 300 K < T < 340 K, μ = 7.7 μB, and θ = −138 K.2.(b) A modified Curie-Weiss behavior x = x0 + C/(T + θ), with C = Nμ2/3k. Here x0 = 530 × 10−6, μ = 5.36 μB, and θ = −204 K.3.(c) A ferrimagnetic behavior x = (C1 + C2)T − 2λC1C2T2 − TN2with Ci = Nμ2i/6k and μi constrained = μ ± 0.4 μB. Here λ = 231 ± 49, μ = 6.13 ± 0.2 μB, and TN = (205 ± 0.6) K." @default.
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- W2023849936 date "1980-10-01" @default.
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- W2023849936 title "The magnetic susceptibility of 248Cm metal" @default.
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- W2023849936 doi "https://doi.org/10.1016/0378-4363(80)90160-6" @default.
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