Magnetic circular x-ray dichroism measurements of Fe-Co alloys and Fe/Co multilayers

Oscillation of the Fe and Co Magnetic Moments near the Sharp(1−10)Fe/Co Interface

“…This was done for all configurations with less than six free moments near the interface. We find a pronounced minimum for x 2 by varying three moments in Fe and two moments in Co, consistent with the interpretation by Pizzini et al [3] of older magnetization experiments. We remark that the field of Fe satellite I (Table I) was not found in our fit.…”

“…We find an average moment for the three Fe layers at the interface of 2.4m B . The average moment over the five perturbed layers is 2.1m B which is 20% smaller than the value reported in [3]. While here we probe the sharp interface separately, magnetization experiments probe the entire superlattice.…”

“…Gradmann and co-workers used conversion electron mossbauer spectroscopy to probe Fe surfaces, near surface layers and buried interfaces [2]. Other groups used magnetic circular x-ray dichroism or magnetization measurements to investigate interfaces and to extract information about the averaged moments at the interface [3,4]. We use perturbed angular correlation (PAC) spectroscopy [5] to study the hyperfine fields in Fe͞Co superlattices, and we link the measured hyperfine fields to a microscopic model for the magnetic moments in each layer near the Fe͞Co interface.…”

XAS and XMCD studies of amorphous FeCo-based ribbons

“…With the continuous improvements and availability of synchrotron light sources, the x-ray absorption spectroscopy (XAS) and x-ray circular magnetic dichroism (XMCD) in photoabsorption on core-level edge is frequently used to get information about the effective magnetic moment. Photoemission XMCD also furnishes information on the magnetic moments [11]. As an example, XMCD and extended EXAFS were recently used to investigate FeCo binary alloys [12].…”

Magnetic EXAFS calculations for disordered alloys

“…Calculations (full line), compared against the experimental data (dotted line) (Pizzini et al, 1994).…”