Nonlinear Susceptibility of a Spin Glass Compound (Ti1-xVx)2O3: II

Linear (χ 0 ) and nonlinear (χ 2 ) susceptibilities of (Ti 1- x V x ) 2 O 3 have been studied in detail around the spin freezing temperature T g . The measurement on single crystal has revealed that both χ 0 and χ 2 are highly anisotropic. The linear susceptibility χ 0 shows a cusp at T g . The nonlinear susceptibility χ 2 , which is observed as the third higher harmonic of the applied ac field ( h = h 0 sin ω t ), shows the very sharp peak in the vicinity of T g . The frequency ν(=ω/2π) and amplitude h 0 dependence of χ 2 has been measured in detail to study the critical behavior around T g in the static limit ν→0 and in the infinitesimal field strength h 0 →0. |χ 2 | increases rapidly with decreasing ν and h 0 , which implies the divergence of χ 2 at T g in the limit ν→0 and h 0 →0.

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