Anomalous training effect in exchange‐biased MnPd/Co bilayers

Exchange bias has been studied for a series of MnPd/Co bilayers sputtered onto Si(100) by an RF sputter‐deposition system. The double‐shifted loops with an anomalous training effect have been observed. The manifestation of double‐shifted loops is interpreted as the coexistence of positive exchange bias and negative exchange bias, which is in agreement with the temperature dependence and the observed anomalous training effect. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

[1]  U. Nowak,et al.  A model of the temperature dependence of exchange bias in coupled ferromagnetic∕antiferromagnetic bilayers , 2008 .

[2]  S. Mangin,et al.  Exchange-bias training effect in TbFe/GdFe : Micromagnetic mechanism , 2007 .

[3]  N. T. Nam,et al.  Coexistence of positive and negative exchange bias in CrMn/Co bilayers , 2006 .

[4]  K. Temst,et al.  Reversing the training effect in exchange biased CoO/Co bilayers. , 2005, Physical review letters.

[5]  I. Schuller,et al.  Bidomain state in exchange biased FeF2∕Ni , 2005, cond-mat/0501107.

[6]  I. Schuller,et al.  Lateral length scales in exchange bias , 2004, cond-mat/0411014.

[7]  C. Binek.  Training of the exchange-bias effect: A simple analytic approach , 2004 .

[8]  C. Chien,et al.  Hybrid domain walls and antiferromagnetic domains in exchange-coupled ferromagnet/antiferromagnet bilayers , 2003 .

[9]  J. Stöhr,et al.  Correlation between exchange bias and pinned interfacial spins. , 2003, Physical review letters.

[10]  J. Rabier,et al.  Anomalous magnetization process in exchange-biased MnPd/Co bilayers , 2003 .

[11]  D. Lederman,et al.  Exchange bias flop in FexZn1-xF2/Co bilayers , 2002 .

[12]  U. Nowak,et al.  Domain state model for exchange bias. I. Theory , 2002 .

[13]  T. Kai,et al.  Enhanced uniaxial anisotropy and two-step magnetization process along the hard axis of polycrystalline NiFe/NiO bilayers , 2001 .

[14]  C. Lai,et al.  Exchange-bias-induced double-shifted magnetization curves in Co biaxial films , 2001 .

[15]  Keller,et al.  Diluted antiferromagnets in exchange bias: proof of the domain state model , 2000, Physical review letters.

[16]  G. Güntherodt,et al.  TUNING EXCHANGE BIAS , 1999 .

[17]  Schuller,et al.  Positive exchange bias in FeF2-Fe bilayers. , 1996, Physical review letters.

[18]  Malozemoff.  Random-field model of exchange anisotropy at rough ferromagnetic-antiferromagnetic interfaces. , 1987, Physical review. B, Condensed matter.

[19]  S. Charap,et al.  Thermal fluctuation aftereffect model for some systems with ferromagnetic‐antiferromagnetic coupling , 1972 .

[20]  W. Meiklejohn,et al.  New Magnetic Anisotropy , 1956 .