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Observation of Devil's Staircase in the Novel Spin Valve System SrCo₆O₁₁

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arxiv 1412.7945 v1 pith:GCNDXGE2 submitted 2014-12-26 cond-mat.str-el cond-mat.mtrl-sci

Observation of Devil's Staircase in the Novel Spin Valve System SrCo₆O₁₁

T. Matsuda , S. Partzsch , T. Tsuyama , E. Schierle , E. Weschke , J. Geck , T. Saito , S. Ishiwata
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Y. Tokura H. Wadati
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classification cond-mat.str-el cond-mat.mtrl-sci
keywords magneticdevilspinstaircasefieldmagnetoresistancematerialnovel
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Using resonant soft x-ray scattering as a function of both temperature and magnetic field, we reveal a large number of almost degenerate magnetic orders in SrCo6O11. The Ising-like spins in this frustrated material in fact exhibit a so-called magnetic devil's staircase. It is demonstrated how a magnetic field induces transitions between different microscopic spin configurations, which is responsible for the magnetoresistance of SrCo6O11. This material therefore constitutes a unique combination of a magnetic devil's staircase and spin valve effects, yielding a novel type of magnetoresistance system.

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