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A strongly fluctuating quasi-two-dimensional insulator
(American Institute of Physics, 1991-04-15)
The authors describe neutron-scattering data for SrCr8-xGa4+xO19, a layered compound containing planes of S=3/2 Cr3+ ions which form Kagome lattices. Despite strong antiferromagnetic interactions (θCW≈-500 K), fluctuations ...
Studies of deposition order anomaly of exchange coupling in bilayers and trilayers of NiFe and CoO
(American Institute of Physics, 1997-04-15)
The temperature dependence of the exchange field and coercivity and the effect of deposition order have been studied in a series of bilayer (NiFe/CoO and CoO/NiFe) and trilayer (NiFe/CoO/NiFe) films. A profound difference ...
Giant positive magnetoresistance of Bi nanowire arrays in high magnetic fields
(American Institute of Physics, 1999-04-15)
We have studied the magnetoresistance of electrodeposited Bi wires with diameters between 200 nm and 2 μm in magnetic fields up to B=55 T. In zero field, the resistance increases with decreasing temperature, indicating ...
Magnetic dynamics of La2CuO4 studied by Mossbauer spectroscopy
(American Institute of Physics, 1990-05-01)
By doping a very small amount of 57Fe into La2CuO4, Mossbauer spectroscopy has been applied to study the magnetic property of the parent compound. From the measurement of the magnetic hyperfine field at the Fe nuclei for ...
Memory effects of exchange coupling in CoO/Ni81Fe19 bilayers
(American Institute of Physics, 1999-04-15)
By changing the field-cooling procedure, the value and even the sign of the exchange field HE in CoO/Ni81Fe19 bilayers can be greatly altered. The value of HE can be made to vanish at any temperature below TN. We also show ...
Long-range exchange coupling between a ferromagnet and an antiferromagnet across a nonmagnetic spacer layer
(American Institute of Physics, 1997-04-15)
The antiferromagnet/ferromagnet exchange coupling giving rise to a shifted hysteresis loop has usually been considered an interfacial effect. We show evidence that this exchange coupling between an antiferromagnet (CoO) ...
Effect of spacer material on the magnetic surface anisotropy in ultrathin Fe70B30 multilayer films
(American Institute of Physics, 1991-04-15)
It has been found recently that the magnetic surface anisotropy Ks in Fe70B30/Ag multilayer films decreases monotonically with magnetic layer thickness (2L) for 2L<16.5 Å. In order to determine possible effects of the ...
Dependence of exchange coupling on antiferromagnetic layer thickness in NiFe/CoO bilayers
(American Institute of Physics, 1998-06-01)
A systematic study of the dependence of exchange coupling in NiFe/CoO bilayers on CoO layer thickness tAF from 5 to 500 Å has been made. For large CoO thicknesses (tAF>100 Å), the exchange field varies as 1/tAF, whereas ...
Doubly exchange-biased NiCoO/NiFe/Cu/NiFe/NiCoO spin valves
(American Institute of Physics, 1999-04-15)
A new type of doubly exchange-biased Ni50Co50O/NiFe/Cu/NiFe/Ni30Co70O spin-valve structure, with two ferromagnetic layers exchange biased in opposite directions by two different antiferromagnetic layers is demonstrated. ...
Comparison of the electron-spin-resonance linewidth in multilayered CuMn spin glasses with insulating versus conducting interlayers
(American Institute of Physics, 1994-05-15)
The temperature-dependent electron-spin-resonance linewidth ΔH(T) may be used to investigate the effect of the geometry and interlayer material on the magnetic properties of multilayered systems. We compare ΔH(T) in ...