(Phys.org)—A team of researchers with members from several institutions in the U.S. and one in Germany has proposed the idea of using an extremely small compass needle to build an ultrasensitive ...

Bacteria of the species Magnetospirillum gryphiswaldense are unicellular organisms that can align their locomotion precisely with the Earth's magnetic field. They owe this ability to tiny magnetite ...

If shrunken down to micron size, a compass needle could wobble. (Courtesy: iStockphoto/tobias machhaus) A tiny magnetic needle just 10 μm long could be used to create a magnetic-field sensor that – if ...

A tiny, needle-shaped ferromagnet could form a magnetic sensor far better than the current best instruments, according to theory. A compass for the nanoworld. A 10-micrometer-long needle of ...