Magnetic and magnetoresistance studies of the evolution of the magnetic layer structure with Co layer thickness in electrodeposited Co–Cu/Cu multilayers

Magnetic and magnetoresistance studies of nanometric electrodeposited Co films and Co/Cu layered structures: Influence of magnetic layer thickness

“…The typical SPM moments obtained previously on electrodeposited Co/Cu multilayers [32][33][34][35][36] Previous reports by other researchers on both electrodeposited [36,37] and sputtered [38][39][40] Co/Cu multilayers with very thin Co layers around 1 nm and below gave further support to our findings and conclusions concerning the appearance of SPM regions in such multilayers. Namely, it turned out from these studies when increasing the Co layer thickness in the subnanometer range that whereas the M(H) curves evolve from a hysteresis-less behavior to the appearance of a clear hysteresis, i.e., the formation of FM regions, the MR(H) curves remain still strongly non-saturating with negligible hysteresis.…”

Giant Magnetoresistance and Structure of Electrodeposited Co/Cu Multilayers: The Influence of Layer Thicknesses and Cu Deposition Potential

“…A variety of baths have been used for the preparation of ED Co/Cu multilayers [4], the simplest one containing merely CoSO 4 and CuSO 4 . Over the last two decades, numerous reports have been published on studying the GMR characteristics of ED Co/Cu multilayers from the pure sulfate bath (containing at most some buffering agents) [5][6][7][8][9][10][11][12][13][14][15]. In this list of references, we have included only those works from the much larger number of reports [4] in which the ED Co/Cu multilayers were prepared from the sulfate bath at or close to the electrochemically optimized Cu deposition potential EC Cu E [5,10,16] where neither Co dissolution, nor Co codeposition can occur during the Cu pulse.…”

“…By looking at former reports, [5][6][7][8][9][10][11][12][13][14][15] it can be established that in most cases not completely systematic studies on layer thicknesses have been carried out for ED Co/Cu multilayers from the sulfate bath. For example, there were several studies of the GMR dependence on layer thicknesses, where one of the layer thicknesses was fixed and the other layer thickness was only varied.…”

“…Over the last two decades, numerous reports have been published on studying the GMR characteristics of ED Co/Cu multilayers from the pure sulfate bath (containing at most some buffering agents). [5][6][7][8][9][10][11][12][13][14][15] In this list of references, we have included only those works from the much larger number of reports 4 in which the ED Co/Cu multilayers were prepared from the sulfate bath at or close to the electrochemically optimized Cu deposition potential E EC Cu 5,10,16 where neither Co dissolution, nor Co codeposition can occur during the Cu pulse. These features ensure that the actual layer thicknesses will be fairly close to the nominal values and that the spacer layer will not contain magnetic Co atoms.…”