Giant Magnetic Pulse Rounds up Spins Far and Wide

A team of researchers at the Tata Institute of Fundamental Research, Mumbai and the Indian Institute of Technology, Kanpur have used extremely strong magnetic pulses to line up spins in a magnetic film on a scale never achieved before. They demonstrate beautiful concentric circular patterns of spins as large as hundreds of micrometers. The natural scale for such patterns is typically sub-micrometre. Creation of such large scale ordered spin structures is potentially useful for electronic devices in the terahertz frequency range.

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