Magnetic texture determination by conversion electron Mössbauer spectroscopy with circularly polarized beam

Magnetic Moments' Arrangement in Fe Layers Deposited from Acetone Based Electrolyte

“…The sample was placed in the detector [10] which allows to carry out measurements with two opposite geometries: the wave vector of photon k perpendicular or almost parallel (approximately 2 • ) to the layer plane. All the experiments were performed at room temperature using the spectrometer operating in a constant acceleration mode and a 57 Co source in a Cr matrix.…”

Electron proportional gas counter for linear and elliptical Mössbauer polarimetry

“…4 Nonetheless, the sign of the k-parallel component of the magnetization can be determined using circularly or elliptically polarized radiation. [9][10][11][12][13][14][15] Determination of the alignment of the magnetization of a homogeneously magnetized ͑e.g., 57 Fe-containing͒ ferromagnetic specimen via the spectrum pattern is a textbook case in MS in the thin-emitter/thin-absorber limit. However, the general case of polarized radiation incident at an arbitrary angle on the absorber enriched in the resonant isotope is a still incompletely solved problem in CEMS.…”

“…When using isotope-enriched samples, which is a standard technique nowadays in thin-film laboratories including ours 13,16,17 even in the case of perpendicular incidence, considerable deviations can be detected from the thinemitter/thin-absorber relative intensities. As we shall see, the validity of this statement is rather limited.…”

“…Applying the so-called filter technique, 12,13,15 an almost single-line, highly circularly polarized source can be fabricated. The spectra are relatively simple; however, the method utilizes only a fraction of the source activity.…”

“…14 No account was given in these papers to the possible blackness effects. In a recent paper, 13 ͑using a circularly polarized Mössbauer source͒ the integral blackness effect in CEMS was demonstrated, also offering means to determine the magnetic texture in a 57 Fe specimen. In Ref.…”