LinkNotes: CMR -- A Breakthrough In Storage Technology

2009-06-28

CMR -- A Breakthrough In Storage Technology

'Colossal' Magnetic Effect Under Pressure

(PhysOrg.com) -- Millions of people today carry around pocket-sized music players capable of holding thousands of songs, thanks to the discovery 20 years ago of a phenomenon known as the “giant magnetoresistance effect,” which made it possible to pack more data onto smaller and smaller hard drives. Now scientists are on the trail of another phenomenon, called the “colossal magnetoresistance effect” (CMR) which is up to a thousand times more powerful and could trigger another revolution in computing technology.

The structure models for F-type and A-type magnetic ordering in manganite in response to pressure. The arrows inside orbitals indicate the spin direction of d electrons.

clipped from www.research.ibm.com

Visualize MR and
GMR Heads in
action

Observe the
physics of GMR
in motion

clipped from ftp.aps.anl.gov

A “Colossal” Magnetic Effect under Pressure

Photo: Yang Ding (left) of the Carnegie Institution of Washington, and Daniel Haskel (right) of Argonne shown with x-ray instrumentation used to probe the magnetic ordering of Mn ions in a manganite material at high applied pressures and cryogenic temperatures.