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Ac susceptibility measurements were performed on discontinuous magnetic multilayers [Co80Fe20(t)/Al2O3(3nm)]x10, t = 0.9 and 1.0nm, by Superconducting Quantum Interference Device (SQUID) magnetometry. The CoFe forms nearly spherical…

Disordered Systems and Neural Networks · Physics 2007-05-23 O. Petracic , S. Sahoo , Ch. Binek , W. Kleemann , J. B. Sousa , S. Cardoso , P. P. Freitas

Surface properties of Co-doped BaFe2As2 epitaxial superconducting thin films were inspected by X-ray photoelectron spectroscopy, scanning spreading resistance microscopy (SSRM), and point contact spectroscopy (PCS). It has been shown that…

Superconductivity · Physics 2013-07-31 T. Plecenik , M. Gregor , R. Sobota , M. Truchly , L. Satrapinskyy , F. Kurth , B. Holzapfel , K. Iida , P. Kus , A. Plecenik

Polymer assisted spherical FeNi nanoparticles were prepared via wet chemical method using hydrazine as a reducing agent and polymers (PVP and PEG) as reducing and stabilizing agent. Structural studies performed using XRD and TEM shows…

Materials Science · Physics 2012-12-17 S. K. Karna , S. R. Mishra , E. Gunapala , I. Dubenko , V. Malagareddy , G. K. Marasinghe , N. Ali

The quantitative phase-field approach has been adapted to model solidification in the presence of Metal Matrix Nanocomposites (MMNCs) in a single-component liquid. Nanoparticles of fixed size and shape are represented by additional fields.…

Materials Science · Physics 2014-06-11 Tamás Pusztai , László Rátkai , Attila Szállás , László Gránásy

The fabrication of functional metamaterials with extreme feature resolution finds a host of applications such as the broad area of surface/light interaction. Non-planar features of such structures can significantly enhance their performance…

Room temperature ferromagnetism has been one of the most sought after topics in today's emerging field of spintronics. It is strongly believed that defect- and inhomogeneity- free sample growth should be the optimal route for achieving…

Materials Science · Physics 2012-01-24 Akash Chakraborty , Richard Bouzerar , Stefan Kettemann , Georges Bouzerar

We report the successful synthesis of a new 4$d$ based polycrystalline inverse Heusler alloy Fe$_2$RuGe by an arc melting process and have studied in detail its structural, magnetic and transport properties complemented with first principle…

Heavy plastic shear deformation at relatively low homologous temperatures is called high-pressure torsion (HPT) deformation, which is one method of severe plastic deformation (SPD). The aim of the paper is to give an overview of a new…

Materials Science · Physics 2020-09-09 Andrea Bachmaier , Reinhard Pippan

Nickel carbon nanotube composites with varying amounts of carbon nanotubes are deformed by high pressure torsion at different deformation temperatures to high strains, where no further refinement of the Nickel matrix microstructure is…

A series of (ZnO)m(CoO)n digital alloys and superlattices grown by atomic layer deposition has been investigated by a range of experimental methods. The data provide evidences that the Co interdiffusion in the digital alloy structures is…

Grain boundary diffusion in severely deformed Al-based AA5024 alloy is investigated. Different states are prepared by combination of equal channel angular processing and heat treatments, with the radioisotope $^{57}$Co being employed as a…

A comprehensive study of pulsed nitriding in AISI H13 tool steel at low temperature (400{\deg}C) is reported for several durations. X-ray diffraction results reveal that a nitrogen enriched compound (Epsilon-Fe2-3N, iron nitride) builds up…

Materials Science · Physics 2012-12-17 L. F. Zagonel , J. Bettini , R. L. O. Basso , P. Paredez , H. Pinto , C. M. Lepienski , F. Alvarez

A theory of flow stress (FS), reviewing and developing our research,e.g. arxiv:1803.08247;1908.09338, is proposed,including yield strength (YS) of PC materials for quasi-static plastic loading for grain of average size d in range…

Materials Science · Physics 2020-01-01 Alexander A. Reshetnyak

We present the effect of a nanostructured surface on the emission of ions and electrons from intense (5-36 Petwatt per sq.cm) femtosecond laser produced plasmas. Electrons from optically polished copper targets coated with copper…

Plasma Physics · Physics 2015-06-26 S. Bagchi , P. Prem Kiran , M. K. Bhuyan , S. Bose , P. Ayyub , M. Krishnamurthy , G. Ravindra Kumar

This paper contains results of investigations of inhomogeneous states caused by the coexistence of ferroelectric and antiferroelectric phases in lead-zirconate-titanate based solid solutions. The domains of ferroelectric and…

Materials Science · Physics 2007-05-23 V. M. Ishchuk , N. A. Spiridonov , V. L. Sobolev

The microstructure and mechanical properties of materials saturate to steady states after severe plastic deformation (SPD). Despite the well-known effect of temperature on the steady-state microstructure, there is no general agreement on…

Particle-wave duality suggests we think of electrons as waves stretched across a sample, with wavevector k proportional to their momentum. Their arrangement in "k-space," and in particular the shape of the Fermi surface, where the highest…

Nanometric solid solution alloys are utilized in a broad range of fields, including catalysis, energy storage, medical application, and sensor technology. Unfortunately, the synthesis of these alloys becomes increasingly challenging as the…

Materials Science · Physics 2024-10-18 Yao Hu , Haihui Lan , Bo Hu , Jiaxuan Gong , Donghui Wang , Wen-Da Zhang , Mo Yan , Huicong Xia , Mingde Yao , Mingliang Du

Thermal stability of hydrogenated amorphous Si/Ge multilayers has been investigated by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and Small-Angle X-Ray Diffraction (SAXRD) techniques. Amorphous H-Si/Ge…

Materials Science · Physics 2009-02-11 A. Csik , M. Serenyi , Z. Erdelyi , A. Nemcsics , C. Cserhati , G. A. Langer , D. L. Beke , C. Frigeri , A. Simon

Magnetic hyperfine field at Cu isotopes as impurities in Fe were recently measured at low temperature. A model to explain these experimental results is proposed. The diluted Cu impurities in the ferromagnetic Fe host are described by an…

Nuclear Experiment · Physics 2012-07-19 A. L. de Oliveira , C. M. Chaves , N. A. de Oliveira , A. Troper