Details

Autor(en) / Beteiligte

• Ding, S. L.
• Wu, R.
• Fu, J. B.
• Wen, X.
• Du, H. L.
• Liu, S. Q.
• Han, J. Z.
• Yang, Y. C.
• Wang, C. S.
• Zhou, D.
• Yang, J. B.

Titel

Exchange bias of CoO1−δ/(NiFe,Fe) system with blocking temperature beyond Néel temperature of bulk CoO

Ist Teil von

• Applied physics letters, 2015-10, Vol.107 (17)

Ort / Verlag

Melville: American Institute of Physics

Erscheinungsjahr

2015

Quelle

AIP Journals Complete

Beschreibungen/Notizen

• The exchange bias effects in pulsed laser deposited CoO1−δ/(NiFe,Fe) bilayers were investigated. An anomalously high blocking temperature (TB) of 325 K was obtained for the as-deposited CoO1−δ/ferromagnet bilayers, which is 33 K higher than the Néel temperature of the bulk CoO (TN = 292 K). The amount of oxygen vacancies δ in the CoO1−δ film can be controlled by a post-annealing treatment in the O2 atmosphere. The TB of the CoO1−δ/ferromagnet bilayers increases with an increasing δ from δ = 0 to δ = 0.16. Our results indicate that the high TB of CoO1−δ/ferromagnet bilayers originates from the enhancement of the magnetic interaction in the CoO1−δ layer owing to O2− vacancies.