Characteristic temperatures of exchange biased systems

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Characteristic temperatures in ferromagnetic - antiferromagnetic exchange biased systems are analyzed. In addition to usual blocking temperature of exchange bias TB, and the Néel temperature of an antiferromagnet Tₙ, the inducing temperature Tind, i.e., the temperature, at which the direction of exchange anisotropy is established, has been recently proposed. We demonstrate that this temperature is in general case different from TB and Tₙ. Physics and experimental approaches to measure the inducing temperature are discussed. Measurements of Tind, in addition to TB, and Tₙ, provide important information about exchange interactions in ferromagnetic - antiferromagnetic heterostructures.