TY - JOUR
T1 - Comparative GMR study of Fe/Cu granular films deposited by co-evaporation and cluster beam techniques
AU - Wakoh, K.
AU - Hihara, T.
AU - Konno, T. J.
AU - Sumiyama, K.
AU - Suzuki, K.
N1 - Funding Information:
This work was supported by the New Frontier Program Grant-in-Aid for Scientific Research (No. 07NP0301) given by the Ministry of Education, Science and Culture of Japan. One of the authors (TH) appreciates financial support from the Japan Society for the Promotion of Science.
PY - 1996/10/30
Y1 - 1996/10/30
N2 - We produced Fe/Cu thin films by co-evaporation and cluster-beam (CB) deposition, and compared their magnetoresistance (MR) and magnetic properties. Both co-evaporated and CB-deposited films exhibit giant magnetoresistance (GMR), which do not saturate even at high fields: conduction electrons suffer spin-disorder scattering. With increasing Fe concentration, MR of the co-evaporated films show a sharp maximum at around 23 at.% Fe owing to percolation of magnetic Fe atoms. MR of the CB-deposited films, on the other hand, does not show such a peak. The magnetization of co-evaporated films is smaller than that of CB-deposited films and they do not saturate easily. These observations suggests that the magnetic states of the former are spin glass, while the latter may contain small ferromagnetic clusters. These results demonstrate that the co-evaporated films are chemically and magnetically homogeneous, whereas the CB-deposited films are heterogeneous having granular natures.
AB - We produced Fe/Cu thin films by co-evaporation and cluster-beam (CB) deposition, and compared their magnetoresistance (MR) and magnetic properties. Both co-evaporated and CB-deposited films exhibit giant magnetoresistance (GMR), which do not saturate even at high fields: conduction electrons suffer spin-disorder scattering. With increasing Fe concentration, MR of the co-evaporated films show a sharp maximum at around 23 at.% Fe owing to percolation of magnetic Fe atoms. MR of the CB-deposited films, on the other hand, does not show such a peak. The magnetization of co-evaporated films is smaller than that of CB-deposited films and they do not saturate easily. These observations suggests that the magnetic states of the former are spin glass, while the latter may contain small ferromagnetic clusters. These results demonstrate that the co-evaporated films are chemically and magnetically homogeneous, whereas the CB-deposited films are heterogeneous having granular natures.
KW - Cluster beam
KW - Co-evaporation
KW - Fe/Cu granular films
KW - Giant magnetoresistance
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U2 - 10.1016/S0921-5093(96)10334-8
DO - 10.1016/S0921-5093(96)10334-8
M3 - Article
AN - SCOPUS:0030261318
VL - 217-218
SP - 326
EP - 330
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
ER -