Exchange coupling and magnetization in bcc-(001) Fe/Cu multilayers by a tight-binding LMTO-ASA method

Calculation of Oscillatory Exchange in bcc-Fe/Cu Multilayers

“…The last-mentioned structure is close to the trilayer structure studied experimentally by Celinski and Heinrich [5]. We have found, see [6], that the exchange can be split into separate contributions resulting from the Fe and the Cu spheres. Surprisingly, the Cu contribution apparently always favours ferromagnetic coupling of the Fe slabs.…”

Equivalent Electric Charge of Photons in an Electron--Positron Plasma

“…These periods are only slightly shorter than those extracted from the least-squares fit. The periods of the calculated interlayer coupling in figure 6 may be compared with experiments [13,15] as well as with earlier calculations [16]. Heinrich et al [13] measured the interlayer coupling in the range between 6 and 12 ML of Cu in a Fe/Cu/Fe bcc (001) trilayer sandwich and found only a single change from FM to AFM coupling between 9 and 10 ML of Cu.…”

“…Layered Fe/Cu bcc systems have been grown with the MBE technique [13][14][15] and are known to exhibit a characteristic oscillatory interlayer coupling [13][14][15][16]18]. Fe/Cu bcc sandwiches is found to form an almost ideal QW system with confined QW states at the point, periodically crossing the Fermi level as a function of the quantum-well width [19], similar to what is found for other magnetic multilayer systems [7,8,20].…”

Oscillatory exchange coupling and strong direct tunnelling with AgCl based heterojunctions

“…7. IECs have been evaluated by means of the total energy approach [62][63][64] ðJ exch ¼ E AFM total À E FM total Þ for spacers up to 15 MLs. For both heterostructures the exchange coupling oscillates with respect to the interlayer width between FM and AFM states, having an aspect quite specific for metallic spacers.…”