They create domains along the length of the wire, in which the spins of the electrons of the atoms in the wire are aligned.

ECONOMIST: How to record a memory on a wire

To create the memory they tapered the wire to an hourglass shape at one point along its length.

ECONOMIST: Spintronics

Along either side of the road lay broad swathes of landmines and a double fence of barbed wire that stretches the 151-mile (248 km) length of the DMZ.

CNN: Bush peers into 'evil' North Korea