Magnetic shape-memory alloy

About: Magnetic shape-memory alloy is a research topic. Over the lifetime, 6160 publications have been published within this topic receiving 132576 citations. The topic is also known as: FSMA & ferromagnetic shape memory alloy.

Handbook of magnetism and advanced magnetic materials

Abstract: VOLUME 1: Fundamentals and Theory Part 1: Electron Theory of Magnetism Density Functional Theory of Magnetism Hubbard Model Dynamical Mean Field Theory of Itinerant Electron Magnetism Quantum Monte Carlo Methods Part 2: Strongly Correlated Electronic Systems Heavy Fermions: electrons at the edge of magnetism The Kondo Effect Orbital physics in transition metal oxides: Magnetism and optics Part 3:Theory of Magnetic Spectroscopy and Scattering Magnetic Spectroscopy X-ray and Neutron Scattering by Magnetic Materials Part 4:Spin Dynamics and Relaxation Spin Waves History and A Summary of Recent Developments Dissipative Magnetization dynamics close to the adiabatic regime Part 5:Phase Transitions and Finite Temperature Magnetism Experiment and Analysis Electron Theory of Finite Temperature Magnetism Theory of Magnetic Phase Transitions Disordered and Frustrated Spin Systems Quantum Phase Transitions Part 6: Theory of Magneocrystalline Anisotropy and Magnetoelasticity Theory of Magnetocrystalline Anisotropy and Magnetoelasticity in transition metal systems Theory of Magnetocrystalline Anisotropy and Magnetoelasticity for 4f and 5f Metals Magnetostriction and Magnetoelasticity Theory: a Modern View Part 7: Theory of Transport and Exchange Phenomena in Layer Systems Exchange Coupling in Magnetic Multilayers Enhanced Magnetoresistance Berry phase in magnetism and the anomalous Hall effect Theory of Spin-Dependent Tunneling Part 8: Magnetism of Low Dimensions Magnetism of Low-dimensional Metallic Structures Magnetism of Low-Dimensional Systems: Theory Part 9: Molecular Magnets: Phenomenology and Theory Molecular Magnets: Phenomenology and Theory Part 10: Magnetism and Superconductivity Interplay of Superconductivity and Magnetism Magnetic Superconductors VOLUME 2: Micromagnetism Part 1: Fundamentals of Micromagnetism and Discrete Computational Models General Micromagnetic Theory Numerical Micromagnetics : Finite Difference Methods Numerical Methods in Micromagnetics (FEM) Magnetization dynamics including thermal fluctuations: basic phenomenology, fast remagnetization processes and transitions over high energy barriers Nonlinear Magnetization Dynamics in Nanomagnets Classical Spin Models Part 2: Micromagnetics Applications: Distribution of Equilibrium Configurations, Phase Diagrams and Hysteretic Properties- Small Objects Magnetization Configurations and reversal in small magnetic elements Magnetic Properties of Systems of Low Dimensions Part 3: Micromagnetics Applications: Distribution of Equilibrium Configurations, Phase Diagrams and Hysteretic Properties- Wall in Nanowires Domain Wall Propagation in Magnetic Wires Current Induced Domain-Wall Motion in Magnetic Nanowires The Motion of Domain Walls in Nano-Circuits and its Application to Digital Logic Part 4: Micromagnetics Applications: Distribution of Equilibrium Configurations, Phase Diagrams and Hysteretic Properties- Microstructure and Magnetization Processes Guided Spin Waves Micromagnetism-Microstructure Relations. Micromagnetism of the Hysteresis Loop Modelling of Non-linear Behaviour and Hysteresis in Magnetic Materials Part 5: Magnetization dynamics, solitons, Modes and Thermal Excitations Magnetization Dynamics: Thermal Driven Noise in Magnetoresistive Sensors Modes, Theory and Experiment Nonlinear Multi-dimensional Spin Wave Excitations in Magnetic Films Part 6: Micromagnetics of Spin angular transfer Theory of Spin-Transfer Torque Microwave Generation in Magnetic Multilayers and Nanostructures VOLUME 3: Novel Techniques for Characterizing and Preparing Samples Part 1: X-Ray and Neutron Diffraction Techniques Spin Structures and Spin Wave Excitations Domain States determined by Neutron Refraction and Scattering Polarized neutron reflectivity and scattering of magnetic nanostructures and spintronic materials Part 2: Synchrotron Radiation Techniques, Circular Dichroism of Hard & Soft X-Rays Synchrotron radiation techniques based on X-ray magnetic circular dichroism Part 3: Time and Space Resolved Magnetization Dynamics Ultrafast Magnetodynamics with Lateral Resolution: A View by Photoemission Microscopy Part 4: Electron Microscopy and Electron Holography Lorentz Microscopy of Thin Film Systems Electron Holography Of Ferromagnetic Materials Spin-Polarized Low Energy Electron Diffraction Spin-polarized Low Energy Electron Microscopy (SPLEEM) Scanning Electron Microscopy with Polarisation Analysis Part 5: Magneto-optical Techniques Investigation of Domains and Dynamics of Domain Walls by the Magneto-optical Kerr-effect Magnetization-induced second harmonic generation technique Investigation of Spin Waves and Spin Dynamics by Optical Techniques Time-resolved Kerr-effect and spin dynamics in itinerant ferromagnets Part 6: Spin Polarized Electron Spectroscopies Investigation of Ultrathin Ferromagnetic Films by Magnetic Resonance Spin-Polarized Photoelectron Spectroscopy as a probe of Magnetic Systems High-energy surface spin-waves studied by Spin-polarized Electron Energy Loss Spectroscopy Part 7: Nano Magnetism- Application and Charaterisation Scanning Probe Techniques: MFM and SP-STM Alternative Patterning Techniques : Magnetic Interactions in Nanomagnet Arrays Chemical Synthesis of Monodisperse Magnetic Nanoparticles Nanoimprint Technology for Patterned Magnetic Nanostructures Part 8: Growth Techniques Growth of Magnetic Materials using Molecular Beam Epitaxy Epitaxial Heusler alloys on III-V semiconductors Crystal Growth of magnetic materials VOLUME 4: Novel Materials Part 1: Soft Magnetic Materials Amorphous Alloys Soft Magnetic Materials - Nanocrystalline Alloys Soft Magnetic Bulk Glassy and Bulk Nanocrystalline Alloys Advanced Soft Magnetic Materials for Power Applications Part 2 : Hard Magnetic Materials Rare earth intermetallics for permanent magnet applications Rare-earth (RE) Transition-Metal (T M) Magnets Rare earth nanocrystalline and nanostructured magnets Current Status of Magnetic Industry in China & its Future Part 3: Ferro- and ferrimagnetic oxides and alloys Ferrimagnetic Insulators Crystallography and Chemistry of Perovskites Chalcogenides and Pnictides Dilute Magnetic Oxides and Nitrides Heusler alloys Half Metals Part 4: Ferro- and ferrimagnetic particles Superparamagnetic Particles Novel Nanoparticulate Magnetic Materials and Structures Part 5: Micro- and Nanowires Advanced Magnetic Microwires Template-based Synthesis and Characterization of High-Density Ferromagnetic Nanowire Arrays Magnetic Carbon Part 6: Magnetic Thin Films Magnetic Ultra-hyphen thin Films Magnetic Thin Films Hard Magnetic Films Part 7: Magnetic Materials with outstanding properties Magneto-optical materials Magnetocaloric Materials Magnetostrictive Materials and Magnetic Shape Memory Materials Ferroelectricity in Incommensurate Magnets Magnetism and Quantum Critically in Heavy-Fermion Compounds: Interplay with Superconductivity Molecular nanomagnets Part 8: Biomagnetic Materials Spintronic Biochips For Biomolecular Recognition Application of Magnetic Particles in Medicine and Biology VOLUME 5: Spintronics and Magnetoelectronics Part 1: Metal Spintronics Magnetic Tunnel Junctions including Applications Spin angular momentum transfer in magnetoresistive nano-junctions Spin-transfer in high magnetic fields and single magnetic layer nanopillars Microwave Excitations in Spin Momentum Transfer Devices Theory of Spin-Polarized Current and Spin-Transfer Torque in Magnetic Multilayers Part 2: Exotic Materials High Temperature Superconductivity- Magnetic Mechanisms Ferromagnetic Manganite Films Magnetic Polarons Kondo Effect in Mesoscopic Quantum Dots Ferromagnetic Semiconductors Diluted ferromagnetic semiconductors - theoretical aspects Part 3: Semiconductor spintronics Spin Engineering in Quantum Well Structures Hot Electron Spintronics Spin-dependent transport of carriers in semiconductors Spintronic devices/spin relaxation Theory of Spin Hall Effects in Semiconductors Manipulation of Spins and Coherence in Semiconductors Quantum computing with spins in solids Part 4: Quantum computation The Magnetic Resonance Force Microscope Part 5: Magnetoresistance Tunneling Magnetoresistance in Semiconductors Spin-dependent Tunneling: Role of Evanescent and Resonant States Unusual magnetoresistance including extraordinary and Ballistic

Magnetic anisotropy in metallic multilayers

Abstract: Ferromagnetic materials exhibit intrinsic `easy' and `hard' directions of the magnetization. This magnetic anisotropy is, from both a technological and fundamental viewpoint one of the most important properties of magnetic materials. The magnetic anisotropy in metallic magnetic multilayers forms the subject of this review article. As individual layers in a multilayer stack become thinner, the role of interfaces and surfaces may dominate that of the bulk: this is the case in many magnetic multilayers, where a perpendicular interface contribution to the magnetic anisotropy is capable of rotating the easy magnetization direction from in the film plane to perpendicular to the film plane. In this review, we show that the (in-plane) volume and (perpendicular) interface contribution to the magnetic anisotropy have been separated into terms related to mechanical stresses, crystallographic structure and the planar shape of the films. In addition, the effect of roughness, often inherent to the deposition techniques used, has been addressed theoretically. Several techniques to prepare multilayers and to characterize their growth as well as methods to determine the magnetic anisotropy are discussed. A comprehensive survey of experimental studies on the perpendicular magnetic anisotropy in metallic multilayers containing Fe, Co or Ni is presented and commented on. Two major subjects of this review are the extrinsic effects of strain, roughness and interdiffusion and the intrinsic effect of the crystallographic orientation on the magnetic anisotropy. Both effects are investigated with the help of some dedicated experimental studies. The results of the orientational dependence studies are compared with ab initio calculations. Finally, the perpendicular surface anisotropy and the in-plane step anisotropy are discussed.

Magnetic and martensitic transformations of NiMnX(X=In,Sn,Sb) ferromagnetic shape memory alloys

Abstract: Martensitic and magnetic transformations of the Heusler Ni50Mn50−yXy (X=In, Sn and Sb) alloys were investigated by differential scanning calorimetry measurement and the vibrating sample magnetometry technique. In all these alloy systems, the austenite phase with the ferromagnetic state was transformed into the martensite phase, which means that these Heusler alloys have potential as Ga-free ferromagnetic shape memory alloys (FSMAs). Furthermore, multiple martensitic transformations, such as two- or three-step martensitic transformations, occur in all these alloy systems. It was confirmed by transmission electron microscopy observation that the crystal structure of the martensite phase is an orthorhombic four-layered structure which has not been reported in other FSMAs. Therefore, the present Ga-free FSMAs have the great possibility of the appearance of a large magnetic-field-induced strain.

Structural and magnetic characterization of the intermartensitic phase transition in NiMnSn Heusler alloy ribbons

Abstract: Phase transitions and structural and magnetic properties of rapidly solidified Ni50Mn38Sn12 alloy ribbons have been studied. Ribbon samples crystallize as a single-phase, ten-layered modulated (10M) monoclinic martensite with a columnar-grain microstructure and a magnetic transition temperature of 308 K. By decreasing the temperature, martensite undergoes an intermartensitic phase transition around 195 K. Above room temperature, the high temperature martensite transforms into austenite. Below 100 K, magnetization hysteresis loops shift along the negative H-axis direction, confirming the occurrence of an exchange bias effect. On heating, the thermal dependence of the coercive field HC shows a continuous increase, reaching a maximum value of 1017 Oe around 50 K. Above this temperature, HC declines to zero around 195 K. But above this temperature, it increases again up to 20 Oe falling to zero close to 308 K. The coercivity values measured in both temperature intervals suggest a significant difference in the...

Magnetocaloric effect and its relation to shape-memory properties in ferromagnetic Heusler alloys

Abstract: Magnetic Heusler alloys which undergo a martensitic transition display interesting functional properties. In the present review, we survey the magnetocaloric effects of Ni-Mn-based Heusler alloys and discuss their relation with the magnetic shape-memory and magnetic superelasticity reported in these materials. We show that all these effects are a consequence of a strong coupling between structure and magnetism which enables a magnetic field to rearrange martensitic variants as well as to provide the possibility to induce the martensitic transition. These two features are respectively controlled by the magnetic anisotropy of the martensitic phase and by the difference in magnetic moments between the structural phases. The relevance of each of these contributions to the magnetocaloric properties is analysed.