TY - JOUR
T1 - Structural characterization of base/collector interfaces for magnetic tunnel transistors grown on Si(001)
AU - Wang, Hua
AU - McCartney, Martha
AU - Smith, David
AU - Jiang, Xin
AU - Wang, Roger
AU - Van Dijken, Sebastiaan
AU - Parkin, Stuart S P
N1 - Funding Information:
This work has been partially supported by ONR Award No. N00014-02-1-0922, monitored by Chagaan Baatar. We also acknowledge use of facilities in the John M. Cowley Center for High Resolution Electron Microscopy at Arizona State University.
PY - 2005/5/15
Y1 - 2005/5/15
N2 - The microstructure and composition of magnetic tunnel transistors (MTTs), grown on Si(001) collector substrates, have been investigated using high-resolution and analytical electron microscopy. The effects of different seed layers, including a ferromagnetic metal Fe, and noble metals Pd, Ir, Re, and Ru, on the tunnel junction morphology were studied. The Pd seed layers reacted with the Si substrate, and gave MTTs with a small transfer ratio and relatively large leakage current. Devices based on Ir and Re seed layers invariably shorted out, as did most of those with Ru seed layers. Very thin Fe seed layers gave flat and more abrupt seed-layer/Si substrate interfaces, and among the samples studied, the best transport properties were achieved for a thin Fe seed layer in combination with Co70Fe30 base layer.
AB - The microstructure and composition of magnetic tunnel transistors (MTTs), grown on Si(001) collector substrates, have been investigated using high-resolution and analytical electron microscopy. The effects of different seed layers, including a ferromagnetic metal Fe, and noble metals Pd, Ir, Re, and Ru, on the tunnel junction morphology were studied. The Pd seed layers reacted with the Si substrate, and gave MTTs with a small transfer ratio and relatively large leakage current. Devices based on Ir and Re seed layers invariably shorted out, as did most of those with Ru seed layers. Very thin Fe seed layers gave flat and more abrupt seed-layer/Si substrate interfaces, and among the samples studied, the best transport properties were achieved for a thin Fe seed layer in combination with Co70Fe30 base layer.
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U2 - 10.1063/1.1900936
DO - 10.1063/1.1900936
M3 - Article
AN - SCOPUS:21044440011
SN - 0021-8979
VL - 97
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 10
M1 - 104514
ER -