ALBERT FERT

Albert Fert (b. March 7, 1938) is a French physicist and one of the discoverers of giant magnetoresistance which brought about a breakthrough in gigabyte hard disks. He is currently professor at Université Paris-Sud in Orsay and scientific director of a joint laboratory ('Unité mixte de physique') between the Centre national de la recherche scientifique (National Scientific Research Centre) and Thales Group. He was awarded the 2007 Nobel Prize in Physics together with Peter Grünberg.

Fert graduated in 1962 from the École normale supérieure in Paris. He received his master's degree in 1963 at the University of Paris, and earned his PhD in 1970 at the Université Paris-Sud.
In 1988 Fert discovered the Giant magnetoresistance effect (GMR) in multilayers of iron and chromium which is recognized as the birth of spintronics; GMR was simultaneously and independently discovered by Peter Grünberg from the Jülich Research Centre. Since 1988, Albert Fert has made contributions to the field of spintronics.

AWARDS

American Physical Society International Prize for New Materials (1994)
Grand prix de physique Jean Ricard of the French Physical Society (1994)
International Union of Pure and Applied Physics Magnetism Award (1994)
Hewlett-Packard Europhysics Prize (1997)
Centre National de la Recherche Scientifique Gold Medal (2003)
Wolf Prize in Physics (2006)
Japan Prize (2007)
elected to the French Academy of Sciences in 2004
Nobel Prize in Physics (2007)

AWARDED FOR

Nanotechnology gives sensitive read-out heads for compact hard disks

This year's physics prize is awarded for the technology that is used to read data on hard disks. It is thanks to this technology that it has been possible to miniaturize hard disks so radically in recent years. Sensitive read-out heads are needed to be able to read data from the compact hard disks used in laptops and some music players, for instance.In 1988 the Frenchman Albert Fert and the German Peter Grünberg each independently discovered a totally new physical effect – Giant Magnetoresistance or GMR. Very weak magnetic changes give rise to major differences in electrical resistance in a GMR system. A system of this kind is the perfect tool for reading data from hard disks when information registered magnetically has to be converted to electric current. Soon researchers and engineers began work to enable use of the effect in read-out heads. In 1997 the first read-out head based on the GMR effect was launched and this soon became the standard technology. Even the most recent read-out techniques of today are further developments of GMR.A hard disk stores information, such as music, in the form of microscopically small areas magnetized in different directions. The information is retrieved by a read-out head that scans the disk and registers the magnetic changes. The smaller and more compact the hard disk, the smaller and weaker the individual magnetic areas. More sensitive read-out heads are therefore required if information has to be packed more densely on a hard disk. A read-out head based on the GMR effect can convert very small magnetic changes into differences in electrical resistance and there-fore into changes in the current emitted by the read-out head. The current is the signal from the read-out head and its different strengths represent ones and zeros.The GMR effect was discovered thanks to new techniques developed during the 1970s to produce very thin layers of different materials. If GMR is to work, structures consisting of layers that are only a few atoms thick have to be produced. For this reason GMR can also be considered one of the first real applications of the promising field of nanotechnology