A5083730103- Shape Memory Alloy Transformations
- Magnetic and transport properties of perovskites and related materials
- Magnetic Properties and Applications
- Magnetic Properties of Alloys
- Microstructure and Mechanical Properties of Steels
- Titanium Alloys Microstructure and Properties
- X-ray Diffraction in Crystallography
- High Entropy Alloys Studies
- Creativity in Education and Neuroscience
- Crystallization and Solubility Studies
- Additive Manufacturing and 3D Printing Technologies
- Metallic Glasses and Amorphous Alloys
- Transition Metal Oxide Nanomaterials
- Metallurgical and Alloy Processes
- Heusler alloys: electronic and magnetic properties
- Additive Manufacturing Materials and Processes
- Multiferroics and related materials
- Polymer composites and self-healing
- High Temperature Alloys and Creep
- Intermetallics and Advanced Alloy Properties
- Paleontology and Evolutionary Biology
- Ferroelectric and Piezoelectric Materials
- Microstructure and mechanical properties
- Advanced Thermoelectric Materials and Devices
- Acoustic Wave Resonator Technologies
Universidad Publica de Navarra
2015-2024
University of Pamplona
2024
Universidad de Navarra
2013-2021
Technische Universität Braunschweig
2010
Abstract Additive manufacturing technology has attracted the attention of industrial and technological sectors due to versatility design easy manufacture structural functional elements based on composite materials. The embedding magnetic nanoparticles in polymeric matrix enables development an process low-cost magnetically active novel composites. In this work, we report a series composites prepared by solution casting method combining 5 60 wt.% 140 $$\pm$$ <mml:math...
In this letter, the analysis of magnetocaloric effect (MCE) in a thin film Ni–Mn–Ga alloy sputter deposited on alumina substrate is reported. This has 0.4 μm thickness and exhibits merged martensitic ferromagnetic transitions. The temperature dependence dc magnetization under different constant applied magnetic fields been measured. calculated MCE up to 60 kOe shows feasibility these materials be implemented refrigeration system for functional microsystems. addition, shift transformation...
The influence of long-range L2(1) atomic order on the martensitic and magnetic transformations Ni-Mn-Ga shape memory alloys has been investigated. In to correlate structural transformation temperatures with order, calorimetric, neutron diffraction measurements have performed polycrystalline single-crystalline subjected different thermal treatments. It is found that both increase increasing showing exactly same linear dependence degree order. A quantitative correlation between established,...
The so-called metamagnetic shape memory alloys transform from a ferromagnetic austenite into weak magnetic martensitic phase, thus the application of field, stabilizing high magnetization can induce reverse transformation. Moreover, transformation itself becomes arrested as its temperature range is lowered by enough fields. In this work effect field on Ni-Mn-In-Co has been studied SQUID magnetometry. arrest produced results in metastable states, whose evolution when removed or reduced,...
The influence of the atomic order on martensitic transformation entropy change has been studied in a Ni-Mn-In-Co metamagnetic shape memory alloy through evolution temperatures under high-temperature quenching and post-quench annealing thermal treatments. It is confirmed that evolves as consequence variations degree L21 brought by treatments, though, contrary to what occurs ternary Ni-Mn-In, aging appears be most effective way modify Ni-Mn-In-Co. also shown any value between around 40 5 J/kgK...
The magnetic ground state of the martensitic phase in metamagnetic shape memory alloys seems to be dependent on analyzed system. In Ni2Mn1+xZ1−x (Z = In, Sn, and Sb) alloys, ferromagnetic antiferromagnetic interactions coexist state. Different mechanisms, i.e., reentrant spin glasses, superparamagnetism, or superspin glasses have been proposed explain behavior. this letter, properties Ni-Mn-In-Co determined. shows presence superparamagnetic domains inside a paramagnetic matrix. On cooling,...
Precursor phenomena were investigated in a Ni-Fe-Ga alloy close to the stoichiometric Heusler composition ${\text{Ni}}_{2}\text{FeGa}$. In particular, phonon-dispersion curves, diffuse scattering and magnetic properties of single crystalline ${\text{Ni}}_{51.5}{\text{Fe}}_{21.5}{\text{Ga}}_{27}$ measured as function temperature. The ${\text{TA}}_{2}$ branch along [110] direction $\text{L}{2}_{1}$ phase shows significant phonon softening around $\ensuremath{\xi}=0.35$ resulting marked dip...
Abstract The capacity of adaptability a three-dimensional-printed composite polycaprolactone-based containing micro-particles ferromagnetic shape memory alloy composition Ni 45 Mn 36.7 In 13.3 Co 5 was determined. Composites exhibit an increase in both damping and modulus values up to around 11%, at temperatures close 325 K, when applying magnetic field 120 kA m −1 . addition, composites show also the 50% near 333 related martensitic transformation, which is promoted by oscillating strain...
Ferromagnetic shape memory alloys undergo a martensitic transformation accompanied by change in the magnetic and vibrational properties. However, these property changes are not independent. In this paper, interplay between properties entropy has been analyzed for Ni–Fe–Ga ferromagnetic alloys. The contribution, . Using mean field approximation entropy, full decomposed contribution calculated. Upon removing term, does substantially composition range where TM is below TC. This latter to using...
The effect of the partial substitution Mn by Cr on structural and magnetic properties Ni–Mn–In metamagnetic shape memory alloys is investigated. It found that a Cr-rich second phase appears for quite low concentrations, pointing out very solubility in Ni–Mn–In. Nevertheless, martensitic transformation (MT) temperature doped can be related to variation electron concentration matrix phase, just as it occurs ternary system. field has been evaluated both quaternary alloy. shown presence reduces...
Metamagnetic shape memory alloys have aroused considerable attraction as potential magnetic refrigerants due to the large inverse magnetocaloric effect associated magnetic-field-induction of a reverse martensitic transformation (martensite austenite). In some these alloys, austenite phase can be retained on cooling under high fields, being metastable after field removing. Here, we report giant direct linked anomalous forward (austenite martensite) that undergoes heating. Under moderate...
The influence of defects and local stresses on the magnetic properties martensitic transformation in Ni50Mn35Sn15 is studied at macroscopic atomic scale levels. We show that both structural alloy are very sensitive to slight microstructural distortions. Even though no disorder induced by milling, antiphase boundaries linked dislocations promote antiferromagnetic coupling Mn, resulting a significant decrease saturation magnetization. On other hand, temperature range considerably affected...