1. Magnetization and dynamics of reentrant ferrimagnetic spin-glass [MnTPP]::+[TCNE].−⋅2PhMe
- Author
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William B. Brinckerhoff, A. J. Epstein, Joel S. Miller, E. J. Brandon, and B. G. Morin
- Subjects
chemistry.chemical_compound ,Magnetization ,Materials science ,Reduced properties ,Spin glass ,chemistry ,Condensed matter physics ,Ferrimagnetism ,Direct current ,General Physics and Astronomy ,Tetracyanoethylene ,Critical exponent ,Magnetic susceptibility - Abstract
We present direct current (dc) magnetization M(T,H) and alternating current (ac) susceptibility χac(T,H,f) data for the quasi‐one‐dimensional molecule‐based ferrimagnet [MnTPP]::+[TCNE].−⋅2PhMe (TPP=meso‐tetraphenylporphyrinato, TCNE=tetracyanoethylene). Static scaling of the real part χ′ of the ac susceptibility and data collapse of M(T,H) over a limited reduced temperature range above Tc≊13 K lead to the critical exponents γ≊1.6, β≊0.5, and δ≊4.2. Below Tc, χac depends sensitively on frequency and exhibits a striking double‐peak structure similar to that found in reentrant spin glasses. Possible models for the frequency dependence of the peaks observed in χac are discussed.
- Published
- 1996
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