Materials, devices and methods are described for making and using devices of enhanced electromagnetic transparency. Desirable embodiments include for example, nanomagnetic compositions that provide series and/or parallel resonances that act to diminish induced current and/or voltage in devices and thereby alter electromagnetic penetration. Devices, including medical implants, such as stents, may be formed or modified in a variety of protective conformations. Such conformations include, for example, the addition or formulation with layer(s) of protective material or with of discrete components such as multiple capacitors and inductors.