Driving magnetization perpendicular by antiferromagnetic-ferromagnetic exchange coupling

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Title:	Driving magnetization perpendicular by antiferromagnetic-ferromagnetic exchange coupling
Authors:	Wang, BY (Wang, B.Y.)[ 1,2 ] Jih, NY (Jih, N.Y.) Lin, WC (Lin, W.C.) Chuang, CH (Chuang, C.H.) Hsu, PJ (Hsu, P.J.) Peng, CW (Peng, C.W.) Yeh, YC (Yeh, Y.C.) Chan, YL (Chan, Y.L.) Wei, DH (Wei, D.H.) Chiang, WC (Chiang, W.C.) Lin, MT (Lin, Minn-Tsong)
Contributors:	Dept Phys
Keywords:	ULTRATHIN FE FILMS SPIN-REORIENTATION TRANSITION X-RAY DICHROISM BLOCKING TEMPERATURE CRYSTALLINE-STRUCTURE THICKNESS DEPENDENCE CO/PT MULTILAYERS ELECTRON-EMISSION ALLOY-FILMS ANISOTROPY
Date:	2011-03-22
Issue Date:	2013-01-24 14:25:31 (UTC+8)
Abstract:	Using x-ray photoemission electron microscopy and the magneto-optical Kerr effect, we have demonstrated a perpendicular magnetic anisotropy that could be due to exchange coupling between the ferromagnetic and antiferromagnetic layers. The results of magnetic imaging and hysteresis loops show that the magnetization of Fe and permalloy (Py) films orients from the in-plane to perpendicular direction, as an Mn underlayer is above a threshold value that depends on the Fe or Py layer thickness. Their thickness-dependent behaviors can be quantitatively described by a phenomenological model that takes into account the finite-size effect of the antiferromagnet on exchange coupling. The anisotropy energy extracted from the model and the thermal stability of perpendicular magnetization enhanced with the increase of the Mn underlayer further demonstrate the exchange coupling nature.
Relation:	PHYSICAL REVIEW B 卷: 83 期: 10 文獻號碼: 104417
Appears in Collections:	[Department of Physics ] journal articles

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