Room Temperature Exchange Bias in BiFeO3/Co-Fe Bilayers

Sterwerf C, Meinert M, Arenholz E, Schmalhorst J-M, Reiss G (2016)
IEEE TRANSACTIONS ON MAGNETICS 52(7): 4800204.

Journal Article | Published | English

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Abstract
Thin highly epitaxial BiFeO3 films were prepared on SrTiO3 (100) substrates by reactive magnetron cosputtering. Detailed magneto-optic Kerr effect (MOKE) measurements on BiFeO3/Co-Fe bilayers were performed to investigate the exchange bias as a function of film thicknesses and Co-Fe stoichiometries. We found a maximum exchange bias of H-eb = 92 Oe and a coercive field of H-c = 89 Oe for a 12.5 nm-thick BiFeO3 film with a 2 nm-thick Co layer. The unidirectional anisotropy is clearly visible in in-plane rotational MOKE measurements. Anisotropic magnetoresistance measurements reveal a strongly increasing coercivity with decreasing temperature, but no significant change in the exchange bias field.
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Sterwerf C, Meinert M, Arenholz E, Schmalhorst J-M, Reiss G. Room Temperature Exchange Bias in BiFeO3/Co-Fe Bilayers. IEEE TRANSACTIONS ON MAGNETICS. 2016;52(7): 4800204.
Sterwerf, C., Meinert, M., Arenholz, E., Schmalhorst, J. - M., & Reiss, G. (2016). Room Temperature Exchange Bias in BiFeO3/Co-Fe Bilayers. IEEE TRANSACTIONS ON MAGNETICS, 52(7): 4800204.
Sterwerf, C., Meinert, M., Arenholz, E., Schmalhorst, J. - M., and Reiss, G. (2016). Room Temperature Exchange Bias in BiFeO3/Co-Fe Bilayers. IEEE TRANSACTIONS ON MAGNETICS 52:4800204.
Sterwerf, C., et al., 2016. Room Temperature Exchange Bias in BiFeO3/Co-Fe Bilayers. IEEE TRANSACTIONS ON MAGNETICS, 52(7): 4800204.
C. Sterwerf, et al., “Room Temperature Exchange Bias in BiFeO3/Co-Fe Bilayers”, IEEE TRANSACTIONS ON MAGNETICS, vol. 52, 2016, : 4800204.
Sterwerf, C., Meinert, M., Arenholz, E., Schmalhorst, J.-M., Reiss, G.: Room Temperature Exchange Bias in BiFeO3/Co-Fe Bilayers. IEEE TRANSACTIONS ON MAGNETICS. 52, : 4800204 (2016).
Sterwerf, Christian, Meinert, Markus, Arenholz, Elke, Schmalhorst, Jan-Michael, and Reiss, Günter. “Room Temperature Exchange Bias in BiFeO3/Co-Fe Bilayers”. IEEE TRANSACTIONS ON MAGNETICS 52.7 (2016): 4800204.
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