INTERLAYER EXCHANGE COUPLING IN COMPLEX MAGNETIC MULTILAYERS
Zhang Xiang-dong (张向东)a, Li Lie-ming (李列明)b, Li Bo-zang (李伯臧)a, Pu Fu-cho (蒲富恪)ac
a Institute of Physics and Center for Condensed Matter Physics,Academia Sinica, Beijing 100080, China; b Department of Physics, Tinghua University, Beijing 100084, China; c Department of Physics, Guangzhou Normal College, Guangzhou 510400, China
Abstract We extend the hole confinement model of Edwards et al. to the problem of two kinds of complex magnetic sandwich structures. One is the magnetic sandwich covered on both sides by nonmagnetic films(case 1) and the other is that covered by magnetic films(case 2). The interlayer exchange coupling and the angular dependence of coupling energy in the two cases are investigated systematically. For case 1, our results show that the magnetic and outer nonmagnetic films influence significantly the oscillation behavior of exchange coupling and the appearance of noncollinear exchange coupling is very sensitive to the thickness of magnetic and outer nonmagnetic layers. Our results also show that the nonoscillatory component of the coupling generally varies with the thickness of magnetic(outer nonmagnetic) films and the results in the case where the thickness of both magnetic(outer nonmagnetic) films vary simultaneously are significantly different from that in the case where the thickness of one of the two magnetic(outer nonmagnetic) films is fixed while the other is varied, which is qualitatively in agreement with the experimental measurements. For case 2, the exponential dependence of exchange coupling on the thickness of the intermagnetic layer has been obtained, similar to the Parkin's experimental results for giant magnetoresistance.
Received: 15 December 1997
Accepted manuscript online:
PACS:
75.70.Cn
(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.