TY - JOUR
T1 - Large spin polarization in epitaxial and polycrystalline Ni films
AU - Kim, Tae Hee
AU - Moodera, Jagadeesh S.
PY - 2004/1/15
Y1 - 2004/1/15
N2 - The spin polarization (P) of tunneling electrons from epitaxial and polycrystalline Ni films was investigated using Meservey-Tedrow technique. The tunneling electrons from the Ni(111) surface were predominantly of majority spin, giving a P of +25%. This is the first observation of the P of tunneling electrons from Ni(111) in a planar tunnel junction. A large increase in P was observed for a polycrystalline Ni film (P = +46%) when the Ni surface/interface was cleaner. Our results point to the important role of localized minority d states near EF in defining a higher majority P of the itinerant electrons seen in transport measurements, further showing the feasibility to tailor new materials with even larger P values.
AB - The spin polarization (P) of tunneling electrons from epitaxial and polycrystalline Ni films was investigated using Meservey-Tedrow technique. The tunneling electrons from the Ni(111) surface were predominantly of majority spin, giving a P of +25%. This is the first observation of the P of tunneling electrons from Ni(111) in a planar tunnel junction. A large increase in P was observed for a polycrystalline Ni film (P = +46%) when the Ni surface/interface was cleaner. Our results point to the important role of localized minority d states near EF in defining a higher majority P of the itinerant electrons seen in transport measurements, further showing the feasibility to tailor new materials with even larger P values.
UR - http://www.scopus.com/inward/record.url?scp=1442263644&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.69.020403
DO - 10.1103/PhysRevB.69.020403
M3 - Article
AN - SCOPUS:1442263644
SN - 1098-0121
VL - 69
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 2
ER -