Exchange bias in manganite/SrRuO3 superlattices

M. Ziese, F. Bern, I. Vrejoiu
2013 Journal of Applied Physics  
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more » ... pl. Phys. Lett. 102, 062417 (2013) Effect of antiferromagnetic thickness on thermal stability of static and dynamic magnetization of NiFe/FeMn multilayers J. Appl. Phys. 113, 063913 (2013) Additional information on J. Appl. Phys. superlattices were studied. In both superlattices the ferromagnetic layers are antiferromagnetically coupled across the interfaces. Whereas superlattice La 0.7 Sr 0.3 MnO 3 /SrRuO 3 showed a three-step magnetization reversal mechanism for all temperatures, superlattice Pr 0.7 Ca 0.3 MnO 3 /SrRuO 3 had a compensation point with a two-step below and a three-step reversal mechanism above the compensation temperature. Exchange-bias and coercive fields, the vertical magnetization shift as well as the minor loop opening were measured as a function of the cooling field. Main findings were a change of the exchange-bias field from negative to positive values for increasing cooling fields in the two-step reversal regime and from negative values to zero for increasing cooling fields in the three-step reversal regime. Exchange-bias training occurs mostly within the first magnetization cycle. The data are consistent with the formation of interfacial domain walls. V C 2013 American Institute of Physics.
doi:10.1063/1.4790877 fatcat:bzqzj3jftbg4dnfiovadz2nxe4