TY - JOUR
T1 - Exchange bias and major coercivity enhancement in strongly-coupled CuO/Co films
AU - Gamino, M.
AU - de Andrade, A. M.H.
AU - Salazar Cuaila, J. L.
AU - Schmidt, J. E.
AU - Skumryev, V.
AU - Geshev, J.
PY - 2018/3/1
Y1 - 2018/3/1
N2 - © 2017 Elsevier B.V. The exchange-bias properties of ferromagnetic, either Co or Ni, thin films deposited onto polycrystalline multiferroic CuO are investigated. After field cooling, the CuO/Co magnetization hysteresis loops show exchange bias at temperatures lower than 200 K, while the CuO/Ni system exhibits bias below about 5 K only. It is suggested that the exchange bias of CuO/Co is determined mainly by the magnetization reversal that takes place on the descending branch of the loop. Rather high values of both the interface coupling energy, 0.89 erg/cm2, and coercivity, 2.44 kOe, of the CuO/Co film are obtained at 5 K.
AB - © 2017 Elsevier B.V. The exchange-bias properties of ferromagnetic, either Co or Ni, thin films deposited onto polycrystalline multiferroic CuO are investigated. After field cooling, the CuO/Co magnetization hysteresis loops show exchange bias at temperatures lower than 200 K, while the CuO/Ni system exhibits bias below about 5 K only. It is suggested that the exchange bias of CuO/Co is determined mainly by the magnetization reversal that takes place on the descending branch of the loop. Rather high values of both the interface coupling energy, 0.89 erg/cm2, and coercivity, 2.44 kOe, of the CuO/Co film are obtained at 5 K.
KW - Coercivity enhancement
KW - Exchange bias
KW - Exchange coupling
KW - Magnetic anisotropy
KW - Multiferroicity
U2 - 10.1016/j.jmmm.2017.09.084
DO - 10.1016/j.jmmm.2017.09.084
M3 - Article
VL - 449
SP - 5
EP - 9
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
ER -