TY - JOUR
T1 - Analysis of the interface in ferromagnet/insulator junctions by inelastic-electron-tunneling-spectroscopy
AU - Ando, Y.
AU - Murai, J.
AU - Miyazaki, T.
N1 - Funding Information:
This research is supported by Asahigarasu, Mitsubishi and Yazaki foundations, Storage Research Consortium (SRC), International Joint Research (NEDO) and Grant-in-aids for Scientific Research (No. 084505001 and Priority Areas No. 09236101) from the Ministry of Education, Science, Sports and Culture of Japan.
PY - 1999/6/1
Y1 - 1999/6/1
N2 - Inelastic-electron-tunneling-spectroscopy (IETS) has been applied to investigate the electron states of the interface of Al/Al2O3/Co(dCo = 0 to approximately 50 angstroms)/Al and Al/Al2O3/Ni(dNi = 0 to approximately 50 angstroms)/Al tunneling junctions. A positive zero-bias anomaly was observed in the conductance curve of the junction with dCo≤20 angstroms. Correspondingly, the IET spectra showed a strong negative peak at 4 mV, while another broad peak was observed for the junctions with dCo≥10 angstroms. These results were discussed in terms of the paramagnetic impurity and magnon assisted tunneling processes. On the other hand, a positive peak was observed in the IET curves for the junction with Ni. The possibility of formation of an Ni-Al alloy was considered to explain this result.
AB - Inelastic-electron-tunneling-spectroscopy (IETS) has been applied to investigate the electron states of the interface of Al/Al2O3/Co(dCo = 0 to approximately 50 angstroms)/Al and Al/Al2O3/Ni(dNi = 0 to approximately 50 angstroms)/Al tunneling junctions. A positive zero-bias anomaly was observed in the conductance curve of the junction with dCo≤20 angstroms. Correspondingly, the IET spectra showed a strong negative peak at 4 mV, while another broad peak was observed for the junctions with dCo≥10 angstroms. These results were discussed in terms of the paramagnetic impurity and magnon assisted tunneling processes. On the other hand, a positive peak was observed in the IET curves for the junction with Ni. The possibility of formation of an Ni-Al alloy was considered to explain this result.
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U2 - 10.1016/S0304-8853(98)01050-6
DO - 10.1016/S0304-8853(98)01050-6
M3 - Conference article
AN - SCOPUS:0032641788
SN - 0304-8853
VL - 198
SP - 161
EP - 163
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
T2 - Proceedings of the 1998 3rd International Symposium on Metallic Multilayers (MML-98)
Y2 - 14 June 1998 through 19 June 1998
ER -