Studies of Finite Size Effects on Phase Transitions, using Spin Glasses

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This project involves studies of sputtered multilayer films of spin glass (SG) materials, typically CuMn-based SG alternating with (generally thicker) layers of a non-magnetic metal. These samples are used to study finite size effects, critical behavior, and dimensional cross-over (3d-2d) in both static and dynamic properties of SGs. The work also includes anisotropic superconductivity studies when the non-magnetic metal is a superconductor. An additional effort is devoted to investigations of 1/f noise in SG ordering, and in a mesoscopic single crystal of a semi-magnetic semiconducting SG.