Comparative review of aging properties in spin glasses and other disordered materials

Aging phenomena have been studied in very different materials like polymers , supercooled liquids or disordered orientational crystals. We recall here the main features of aging in spin glasses, and use this example of magneti c systems as a guideline for the description of the others. A particular at tention is put on the sensitivity of aging to the cooling rate and to tempe rature variations. This allows us to point out differences between temperat ure specific processes, yielding "rejuvenation and memory effects" as known in spin glasses, and domain growth processes, giving cumulative contributi ons at different temperatures. The relevance of wall depinning processes to rejuvenation and memory effects is discussed at the light of recent result s on disordered ferromagnets.