Magnets are technologically very important materials that are
essential in today's high-tech society. One new class magnets
being studied is based on manganoporphyrins. Bulk magnetic ordering
is observed with ordering temperatures, T_c, occurring below 30~K
depending on the substituent, solvent, etc. Typically, this class of
magnets exhibit frequency dependent ac magnetic susceptibility
characteristic of spin glass behavior. Although spin glass behavior
is well studied it is for spin dilute systems, it is not for spin
concentrated, systems. Experimental data characteristic of the spin
glass behavior will be presented, and the data will be discussed in
terms of a novel viscous glassy behavior in a quasi-one-dimensional
cluster glass.
* Supported in part by Department of Energy Grant Nos. DE FG 03-93ER45504
and DE-FG02-86ER45271 and NSF CHE-110685.