Formation of precipitates in off-stoichiometric Ni-Mn-Sn Heusler alloys probed through the induced Sn-moment.

The shell-ferromagnetic effect originates from the segregation process in off-stoichiometric Ni-Mn-based Heusler alloys. In this work, we investigate the precipitation process of L2-ordered NiMnSn and L1-ordered NiMn in off-stoichiometric NiMnSn during temper annealing, by X-ray diffraction (XRD) and Sn Mössbauer spectroscopy. While XRD probes long-range ordering of the lattice structure, Mössbauer spectroscopy probes nearest-neighbour interactions, reflected in the induced Sn magnetic moment.

A Unique Mechanochemical Redox Reaction Yielding Nanostructured Double Perovskite SrFeMoO With an Extraordinarily High Degree of Anti-Site Disorder.

Strontium ferromolybdate, SrFeMoO, is an important member of the family of double perovskites with the possible technological applications in the field of spintronics and solid oxide fuel cells. Its preparation a multi-step ceramic route or various wet chemistry-based routes is notoriously difficult. The present work demonstrates that SrFeMoO can be mechanosynthesized at ambient temperature in air directly from its precursors (SrO, α-Fe, MoO) in the form of nanostructured powders, without the need for solvents and/or calcination under controlled oxygen fugacity.

Creating a Ferromagnetic Ground State with T Above Room Temperature in a Paramagnetic Alloy through Non-Equilibrium Nanostructuring.

Materials with strong magnetostructural coupling have complex energy landscapes featuring multiple local ground states, thus making it possible to switch among distinct magnetic-electronic properties. However, these energy minima are rarely accessible by a mere application of an external stimuli to the system in equilibrium state. A ferromagnetic ground state, with T above room temperature, can be created in an initially paramagnetic alloy by nonequilibrium nanostructuring.

The Pyrococcus furiosus ironome is dominated by [FeS] clusters or thioferrate-like iron depending on the availability of elemental sulfur.

Pyrococcus furiosus is a hyperthermophilic anaerobic archaeon whose metabolism depends on whether elemental sulfur is (+S) or is not (-S) included in growth medium. Under +S conditions, expression of respiratory hydrogenase declines while respiratory membrane-bound sulfane reductase and the putative iron-storage protein IssA increase. Our objective was to investigate the iron content of WT and ΔIssA cells under these growth conditions using Mössbauer spectroscopy.

Intercalation-driven reversible control of magnetism in bulk ferromagnets.

An extension in magnetoelectric effects is proposed to include reversible chemistry-controlled magnetization variations. This ion-intercalation-driven magnetic control can be fully reversible and pertinent to bulk material volumes. The concept is demonstrated for ferromagnetic iron oxide where the intercalated lithium ions cause valence change and partial redistribution of Fe(3+) cations yielding a large and fully reversible change in magnetization at room temperature.

Biographical sketch: Harald Tscherne, MD (1933-present).

This biographical sketch on Prof. Harald Tscherne corresponds to the historic text, The Classic: Der Straßenunfall [Traffic Accidents]. Wien Med Wochenschr.

Biographical sketch: John Albert Key, 1890-1955.

This biographical sketch on John Albert Key corresponds to the historic text, The Classic: Epiphyseal coxa vara or displacement of the capital epiphysis of the femur in adolescence, available at DOI 10.1007/s11999-013-2913-y.

Biographical sketch: Franz König, MD 1832-1910.

This biographical sketch on Franz König corresponds to the historic text, The Classic: Ueber freie Körper in den Gelenken [On loose bodies in the joint] (1887), available at DOI 10.1007/s11999-013-2824-y (Translated by Drs. Richard A.

Biographical sketch: Ernest Amory Codman, MD (1869-1940).

This biographical sketch on E.A. Codman corresponds to the historic text, The Classic: A Study in Hospital Efficiency: As Demonstrated by the Case Report of the First Five Years of a Private Hospital (1918), available at DOI 10.

Biographical sketch: Thomas W. Huntington, MD (1849-1929).

This biographical sketch on Thomas Huntington corresponds to the historic text, The classic: case of bone transference. use of a segment of fibula to supply a defect in the tibia (1905), available at DOI 10.1007/s11999-012-2496-z .

Reviewing for clinical orthopaedics and related research.

Peer review in science was established in the 17th Century and while not without detractors and some controversy, has been a mainstay of high-quality scientific publications ever since. Most believe peer review adds substantially to the value of papers that achieve publication. However, in practice, peer review can be practiced with varying degrees of rigor and the value of the review depends on rigor.

Biographical sketch: Georg Clemens Perthes, MD (1869-1927).

This biographical sketch on Georg Perthes corresponds to the historic text, The Classic: On Juvenile Arthritis Deformans (1910), available at DOI 10.1007/s11999-012-2433-1.

Biographical sketch: Charles Hewitt Moore, FRCS (1821-1870).

This biographical sketch on Charles Moore corresponds to the historic text, The Classic: An account of a Case of Fracture and Distortion of the Pelvis, combined with an unusual form of Dislocation of the Femur (1851), available at DOI 10.1007/s11999-012-2425-1 .

Biographical sketch: Frank Wild Holdsworth, FRCS (1904-1969).

This biographical sketch on Frank Holdsworth corresponds to the historic text, The Classic: Dislocation and fracture-dislocation of the pelvis (1948), available at DOI 10.1007/s11999-012-2423-3 .