Mössbauer study of the Al-Fe decagonal phase

On the ferromagnetism of AlFe2B2

“…1 ( % 16%). Moreover, the Mossbauer parameters of the doublet are very similar to the parameters of Fe 4 Al 13 doublet [9,15,16]. On the other hand, a fraction of the Fe at 4j sites might have been substituted by B or Al atoms (even though the measured lattice parameters are very close to those reported for single crystal AlFe 2 B 2 ) [2].…”

Superparamagnetic behavior of structural domains in epitaxial ultrathin magnetite films

“…͓S0163-1829͑98͒00914-X͔ Thin-film systems of magnetic transition metal oxides are under intense investigation at present, for their unique magnetic properties. [1][2][3] The combination of full spin polarization at the Fermi level and magnetic ordering temperatures above room temperature allow for the development of device concepts. Much recent work focuses on spin-polarized current injection.…”

Muon spin relaxation studies of superconducting cuprates

“…The Uemura plots shown in figures 4 and 5 have been described as generic, but this behaviour is distinctive of the 2D CuO 2 planes and applicable only for HTS cuprates which do not possess structural CuO chains. The CuO chains that characterize R-123, R-247 and R-124 are known to be metallic as evidenced by short NQR relaxation times [26], transport anisotropy [27], infrared conductivity [28] and a distinctive positive slope in the temperature dependence of the thermoelectric power in contrast to the generic negative slope seen in the remaining HTS cuprates [29]. One might expect therefore that, although not intrinsically superconducting, the chains superconduct by proximity to the CuO 2 planes [30].…”