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- W1989821072 abstract "Polarization analysis of the transmitted beam was performed using a pulsed neutron source in a reentrant-spin-glass (RSG) system ${mathrm{Ni}}_{1mathrm{ensuremath{-}}mathit{x}}$${mathrm{Mn}}_{mathit{x}}$, for a concentration range (0.23ensuremath{le}xensuremath{le}0.28) encompassing the critical concentration. The polarization P was measured as a function of temperature, neutron wavelength, and applied field. Unlike other RSG systems previously studied, P decreases at all temperatures below the Curie temperature even for the samples close to the critical concentration. This behavior is also observed in Fe-Zr alloys. In Ni-Mn the wavelength dependence of the polarization indicates the existence of magnetic domains, whose size ensuremath{delta} decreases, with increasing x, from 10 to 50 ensuremath{mu}m at x=0.23 to a few thousands of angstroms at x=0.25. No depolarization occurs for x>0.25. As shown for x=0.23, the irreversibilities of the polarization, which depend on the cooling conditions, indicate that the domain arrangement freezes at low temperature. Clearly, in Ni-Mn, the drop of the susceptibility at low temperature does not result from a decrease of the size or magnetization of the domains but from a slowing down of their mobility." @default.
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- W1989821072 date "1991-09-01" @default.
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- W1989821072 title "Evidence of magnetic domains in the reentrant spin glasses<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Ni</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi mathvariant=normal>−</mml:mi><mml:mi mathvariant=italic>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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- W1989821072 doi "https://doi.org/10.1103/physrevb.44.5120" @default.
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