Article
Nanoscience & Nanotechnology
M. J. Szczerba
Summary: This study reports the first observations of giant magnetic-field-induced bending effect in Ni-Mn-Ga-Co-Cu alloys produced by the melt-spinning technique. The bending effect initiation was observed at a very low magnetic field, and the overall deformation was composed of plastic and elastic contributions, with the elastic contribution dominating in the later stages of the experiment.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
A. Deltell, Abd El-Moez A. Mohamed, P. Alvarez-Alonso, M. Ipatov, J. P. Andres, J. A. Gonzalez, T. Sanchez, A. Zhukov, M. L. Escoda, J. J. Sunol, R. Lopez Anton
Summary: Fe substitution for Mn in Ni50Mn36-xFexSn14 alloys reduces the characteristic temperatures of the martensitic transformation and the Curie temperature of the austenite phase linearly. The applied magnetic field has a negligible effect on the martensitic transition temperatures.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Liang Sun, Kuo-She Li, Hong-Wei Li, Dun-Bo Yu, Yang Luo, Jin-Ling Jin, Shuo Lu, Ning-Tao Quan
Summary: Melt-spun Y16Fe78B6 ribbons were prepared using the melt-spinning technique with pure Y, Fe, and Fe-B alloy in argon. The ribbons mainly consisted of Y2Fe14B, YFe2, and alpha-Fe phases. The amorphous phase appeared at a wheel velocity of >35 m·s(-1). The ribbons prepared at the optimum wheel velocity and heat treatments exhibited coercivity, remanence, and maximum energy product of 239.5 kA·m(-1), 0.61 T, and 32.7 kJ·m(-3) respectively. Investigation of the Henkel plots of the ribbons revealed that intergrain exchange coupling enhanced the remanence. The coercivity mechanism of the ribbons prepared at 35 m·s(-1) was mainly controlled by inhomogeneous pinning of domain walls. The phase component and magnetic properties changed with annealing temperature and time. The optimum magnetic properties were obtained with the ribbon quenched at 35 m·s(-1) and annealed at 700 degrees C for 10 min.
Article
Thermodynamics
Nithya Christopher, Kritika Anand, A. K. Srivastava, Nidhi Singh
Summary: The thermal and kinetic analysis of partially crystallized Hf1.5Zr0.5Co10FeB melt-spun ribbon was studied using differential scanning calorimetry, showing a three-step exothermic crystallization process. The kinetics of crystallization revealed that the alloy's crystallization is initially governed by three-dimensional growth, shifting to one-dimensional growth later.X-ray diffraction confirmed the crystalline phases in optimized annealed samples, while scanning electron microscopy investigated the microstructural dependence of grain growth during annealing. Magnetic hysteresis loop measurements demonstrated the evolution of hard magnetic properties upon annealing at 823 K.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Physics, Applied
P. Sivaprakash, S. Esakki Muthu, C. Saravanan, N. V. Rama Rao, Ikhyun Kim
Summary: This study investigates the electrical, structural, and magnetic characteristics of Ni-Mn-Sb melt-spun alloy ribbons and finds that increasing Mn content improves the Curie temperatures of the austenitic and martensitic phases. Additionally, coercivity increases with temperature, reaching a peak within a certain temperature range, and then decreases. Furthermore, increasing Mn content leads to higher magnetocaloric effect and negative magneto-resistance values.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Physics, Condensed Matter
Tetsuji Saito, Soichiro Kamishima, Daisuke Nishio-Hamane
Summary: The substitution of Co for Fe in the Fe2TiSn Heusler compound affects its magnetic properties, with the Co-substituted compounds showing ferromagnetism. The Fe2TiSn compound is a p-type thermoelectric material, while the Co-substituted (Fe,Co)(2)TiSn compounds are n-type thermoelectric materials. The power factor of the Co2TiSn Heusler compound is more than double that of the Fe2TiSn compound.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Chemistry, Physical
Le Feng, Jens Freudenberger, Kornelius Nielsch, Thomas George Woodcock
Summary: MnAl-C-Ni magnets with high energy products were produced by hot extruding pulverised melt-spun ribbons, with smaller initial -r-phase grain sizes contributing to an enhancement of the squareness factor of the demagnetisation curve.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Yikun Zhang, Jianlong Ouyang, Xin Wang, Yun Tian, Zhongming Ren
Summary: In this work, Ti-doped Ni48Cu2Mn36Sn14-xTix ribbons were fabricated and studied to understand the magneto-structural transformations (MSTs) and improve the magnetocaloric performance of Hensler type Ni-Mn-Z (Z = Ga, In, Sn, or Sb) alloys. It was found that Ti doping can regulate the MSTs, enhance the magnetocaloric effect, and reduce thermal and magnetic hysteresis losses in these alloys.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
P. Czaja, M. Kowalska, A. Brzoza-Kos, M. J. Szczerba
Summary: This paper reports on the mechanical properties observed during bending experiments conducted on quinary Ni-Mn-Ga-Co-Cu melt-spun ribbons. Different mechanical responses are noted depending on the ribbon's side to which force is applied. Substantially larger mechanical instabilities are observed when force is applied to the free side, while much lower force fluctuations are recorded when force is applied to the wheel side. The results also show that the force-displacement curve changes upon cycling, primarily by decreasing the maximum force and mechanical hysteresis.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Mahsa Namvari, James. J. Rosero-Romo, Ville Laitinen, Aditya Kumthekar, Daniel Salazar, Kari Ullakko
Summary: The effects of Mn substitution and Fe addition on the crystal structure, phase transformation temperatures, and magnetic properties of magnetic shape memory alloys were investigated. Ni49.8Mn27.5Ga21.7Fe1 was found to be a promising composition for designing and manufacturing functional micro-actuators.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Fanghua Tian, Qizhong Zhao, Jiale Guo, Sen Kong, Bingjie Liu, Zhiyong Dai, Minxia Fang, Yin Zhang, Chao Zhou, Kaiyan Cao, Sen Yang
Summary: The structure of a material plays a crucial role in determining its physical properties. By adjusting the wheel speed, the structure of Ni50Mn37Ga13 spun ribbons can be modified to regulate the exchange bias effect. Experimental results show that as the wheel speed increases, the martensite lath decreases and the structure changes, with the optimal exchange bias effect occurring at a wheel speed of 25 m center dot s(-1).
Article
Chemistry, Physical
Chunyang Zhang, Laureline Porcar, Salvatore Miraglia, Patricia Donnadieu, Muriel Braccini, Richard Haettel, Marc Verdier
Summary: In this study, the microstructure and mechanical properties of long Ni-Fe-Mn-(Al, In) as-spun ribbons were investigated. It was found that the ribbons exhibited a microstructural gradient along the thickness direction, with equiaxed grains and elongated grains possessing a strong fiber texture. The hardness showed little variation between the two different microstructures. The substitution of In by Al slightly improved the ductility index and the fine equiaxed grains showed better tensile resistance. Moreover, the maximum bending strain of the ribbons was improved by the substitution of In by Al.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Yan Feng, Chen Fang, Yan-Ling Ai, Hai-Bo Wang, Li Gao, Hong Chen, Xiao-Hai Bian
Summary: The crystal orientation of Ni50Mn25In25 and Ni50Mn34In16 melt-spun ribbons, which exhibit parent phase at room temperature, was investigated in this study. The grains were found to grow perpendicular to the ribbon's surface, showing distinct columnar crystals. X-ray diffraction and electron backscattered diffraction techniques were used to identify the orientation information. The results indicate a well-developed preferred orientation parallel to the direction, in accordance with the Eucken-Hirsch texture observed in other shape memory ribbons. This texture is predicted to be beneficial for magnetic field-induced strain compared to common polycrystals. The findings of this study provide a reference for the preparation of Ni-Mn-In melt-spun ribbons.
Article
Materials Science, Multidisciplinary
Alejandro F. Manchon-Gordon, Raul Lopez-Martin, Jhon J. Ipus, Javier S. Blazquez, Peter Svec, Clara F. Conde, Alejandro Conde
Summary: This study analyzed the non-isothermal kinetics of the martensitic transition from 14M modulated martensite to austenite phase in Ni55Fe19Ga26 ribbons obtained by melt-spinning. It was found that the activation energy decreases as the heating rate increases, and the temperature evolution of the austenite fraction can be described by first-order autocatalysis with good agreement between predicted curves and experimental data.
Review
Physics, Applied
Pham Thi Thanh, Nguyen Van Duong, Nguyen Mau Lam, Luu Tien Hung, Kieu Xuan Hau, Nguyen Huy Ngoc, Nguyen Hai Yen, Nguyen Huy Dan
Summary: In this study, the structure and magnetic properties of melt-spun Co-Zr-(B, Al) ribbons were investigated. It was found that adjusting the concentrations of Zr, B, and Al in the alloys can improve the magnetic properties of the Co-Zr-based materials.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2022)
