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Abstract
The low-field ac magnetic susceptibility (1.5–300 K), low temperature specific heat Cp (0.8–40 K), and electrical resistivity (ρ/ρ300) of the amorphous alloys (Co100−xMnx)76B24 with (0<x<50) have been determined using samples with a common origin. As the magnetic state changes from ferromagnetic to spin-glass the linear contribution to Cp increases by more than a factor of 3. Near the magnetic tricritical point concentration (x≂35) a new sharp discontinuity in the Debye temperature θD(0) is reported. Parallel changes in (ρ/ρ300) occur, and the Debye temperatures obtained from the latter are in excellent agreement with those obtained from CP for the ferromagnetic alloys.
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