Details

Autor(en) / Beteiligte

• Wang, Yu-Jen
• Lai, Chih-Huang
• Huang, Po-Hsiang
• Shen, Chih-Ta
• Yang, S. Y.
• Chin, T. S.
• Lin, Hsiu-Hau
• Hong, Tzay-Ming
• Lin, H. J.
• Chen, C. T.

Titel

Uniaxial to unidirectional transition of perpendicular interlayer coupling in IrMn∕CoFe∕NiFeO∕CoFe quadrilayers

Ist Teil von

• Applied physics letters, 2006-03, Vol.88 (11)

Erscheinungsjahr

2006

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We studied the interlayer coupling in the quadrilayer consisting of IrMn∕CoFe (bottom layer)/NiFeOx∕CoFe (top layer). An in-plane perpendicular interlayer coupling is observed between CoFe layers at room temperature. An anisotropy transition from uniaxial to unidirectional in a perpendicular direction is observed around Tt=55K. The nano-oxide layer NiFeOx shows no distinguishable ferromagnetic signal in the high-temperature (uniaxial) phase, while a strong signal appeared in the low-temperature (unidirectional) phase. A possible two-component scenario, in which the nano-oxide layer may contain both amorphous short-range antiferromagnetic domains and superparamagneitc clusters, is proposed to explain the phase transition.