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• W1972822076 abstract "Magnetization data in fields up to 210 kOe were obtained on ${mathrm{Zn}}_{1mathrm{ensuremath{-}}mathrm{x}}$${mathrm{Mn}}_{mathrm{x}}$Te samples with x=0.031 and 0.040. At Tapeq21.4 K, a magnetization step was observed near 150 kOe. This step is attributed to a level crossing for pairs of nearest-neighbor (NN) Mn spins. The magnetic field at the center of the step gives J/${k}_{B}$=-10.0ifmmodepmelsetextpmfi{}0.8 K for the NN exchange constant. This value is slightly higher than that obtained from inelastic neutron scattering. The magnitude of the magnetization step agrees with calculations which assume a random Mn distribution. The technical saturation value for the magnetization at low temperatures also agrees with calculations which assume a random Mn distribution. Low-field susceptibility data, taken at 4ensuremath{le}Tensuremath{le}350 K, lead to Curie constants which agree with those calculated with S=(5/2) and g=2 for each Mn ion. Assuming NN interactions only, and a random Mn distribution, the Curie-Weiss temperatures give J/${k}_{B}$apeq2-12 K. A detailed theoretical discussion of the NN cluster model, as it applies to the magnetization curve of a dilute magnetic semiconductor at low T, is given. Many of the theoretical results also should apply to a larger class of dilute magnetic materials." @default.
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• W1972822076 date "1986-01-01" @default.
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• W1972822076 title "Nearest-neighbor exchange constant and Mn distribution in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Zn</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi mathvariant=normal>−</mml:mi><mml:mi mathvariant=normal>x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Mn</…" @default.
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• W1972822076 doi "https://doi.org/10.1103/physrevb.33.356" @default.
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