Generation of charge current from magnetization oscillation via the inverse of voltage-controlled magnetic anisotropy effect.

It is well known that oscillating magnetization induces charge current in a circuit via Faraday's law of electromagnetic induction. New physical phenomena by which magnetization dynamics can produce charge current have gained considerable interest recently. For example, moving magnetization textures, such as domain walls, generates charge current through the spin-motive force. Here, we examine an entirely different effect, which couples magnetization and electric field at the interface between an ultrathin metallic ferromagnet and dielectric. We show that this coupling can convert magnetic energy into electrical energy. This phenomenon is the Onsager reciprocal of the voltage-controlled magnetic anisotropy effect. The effect provides a previously unexplored probe to measure the magnetization dynamics of nanomagnets.

Diagnosis of rare malignant tumours of the breast by FNA cytology--a report of 3 cases.

This report describes the fine needle aspiration (FNA) cytology findings in 3 cases with breast tumours. The characteristic cyto architectural pattern helped in the diagnosis of two papillary carcinomas. The predominant spindle cell pattern with scattered bizarre cells was interpreted as malignant spindle cell tumour in one case. On histopathology, this was diagnosed as metaplastic carcinoma.