Loop bifurcation and magnetization rotation in exchange-biased<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Ni</mml:mi><mml:mo>∕</mml:mo><mml:msub><mml:mi>FeF</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>
Physical review. B, Condensed matter and materials physics