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Exchange bias in BiFe<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>0</mml:mn><mml:mo>.</mml:mo><mml:mn>8</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>Mn<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>0</mml:mn><mml:mo>.</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>O<mml:math xmlns:mml="http://www.w3.org/1998/…
We have observed conventional signatures of exchange bias (EB), in the form of a shift in the field-cooled hysteresis loop, and a training effect, in BiFe${}_{0.8}$Mn${}_{0.2}$O${}_{3}$ nanoparticles. From neutron diffraction, thermoremanent magnetization, and isothermoremanent magnetization measurements, the nanoparticles are found to be core shell in nature, consisting of an antiferromagnetic …