TY - JOUR
T1 - Saturation Magnetization of Ultra-thin Fe and Ni Layers in (Fe, Ni)/Cu Multilayers
AU - Nakatani, Ryoichi
AU - Sakuma, Akimasa
AU - Sugita, Yutaka
PY - 1999/12/1
Y1 - 1999/12/1
N2 - We have experimentally and theoretically investigated saturation magnetizations of Fe layers and Ni layers with thicknesses of 0.2-2.0 nm in Fe/Cu and Ni/Cu multilayers. The saturation magnetizations 4πMs of the Fe layers at room temperature and at liquidHe temperature are 21 kG at the thicknesses above 1.4 nm, and decrease with decreasing thickness below 1.4 nm. The 4πMs of the Fe layers at liquid-He temperature and at room temperature are 8 kG and 3 kG, respectively, when the thickness of the Fe layers is 0.2 nm (1 ML). The 4πMs of the Ni layers at room temperature and at liquid-He temperature are 5-6 kG at the thickness of 2.0 nm, also decrease with decreasing thickness below 1.6 nm, and become 0 KG at 0.2 nm (1 ML). The observation of the cross-section of the Fe/Cu multilayers indicates that the Fe layers are continuous and flat, even though the thickness of the Fe layers is ultra-thin of 0.4 nm. Magnetic moments of the Fe and the Ni layers have been calculated based on linear muffintin orbital method, and are significantly higher than the measured values.
AB - We have experimentally and theoretically investigated saturation magnetizations of Fe layers and Ni layers with thicknesses of 0.2-2.0 nm in Fe/Cu and Ni/Cu multilayers. The saturation magnetizations 4πMs of the Fe layers at room temperature and at liquidHe temperature are 21 kG at the thicknesses above 1.4 nm, and decrease with decreasing thickness below 1.4 nm. The 4πMs of the Fe layers at liquid-He temperature and at room temperature are 8 kG and 3 kG, respectively, when the thickness of the Fe layers is 0.2 nm (1 ML). The 4πMs of the Ni layers at room temperature and at liquid-He temperature are 5-6 kG at the thickness of 2.0 nm, also decrease with decreasing thickness below 1.6 nm, and become 0 KG at 0.2 nm (1 ML). The observation of the cross-section of the Fe/Cu multilayers indicates that the Fe layers are continuous and flat, even though the thickness of the Fe layers is ultra-thin of 0.4 nm. Magnetic moments of the Fe and the Ni layers have been calculated based on linear muffintin orbital method, and are significantly higher than the measured values.
KW - Magnetic moment
KW - Multilayer
KW - Saturation magnetization
KW - Ultra-thin magnetic layer
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U2 - 10.1109/20.801088
DO - 10.1109/20.801088
M3 - Article
AN - SCOPUS:0033184416
VL - 35
SP - 3070
EP - 3072
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
SN - 0018-9464
IS - 5 PART 1
ER -