Results 51 to 60 of about 10,844 (271)

Entropy change at the martensitic transformation in ferromagnetic shape memory alloys Ni_{2+x}Mn_{1-x}Ga

, 2003
The entropy change $\Delta S$ between the high-temperature cubic phase and the low-temperature tetragonally-based martensitic phase of Ni$_{2+x}$Mn$_{1-x}$Ga ($x = 0 - 0.20$) alloys was studied.
K. Oikawa, Khovailo V. V., Khovailo V. V., Matsumoto M., Obradó E., Pelegrina J. L., T. Abe, T. Takagi, V. V. Khovailo   +8 more
core   +1 more source

Magnetoresistance behavior of a ferromagnetic shape memory alloy: Ni_1.75Mn_1.25Ga [PDF]

, 2008
A negative-positive-negative switching behavior of magnetoresistance (MR) with temperature is observed in a ferromagnetic shape memory alloy Ni_1.75Mn_1.25Ga. In the austenitic phase between 300 and 120 K, MR is negative due to s-d scattering. Curiously,
Ahuja, B. L., Banik, S., Barman, S. R., Chakrabarti, Aparna, Mukhopadhyay, P. K., Pandey, D., Paulose, P. L., Rawat, R., Singh, A. K., Singh, S.   +9 more
core   +1 more source

Exploiting Two‐Photon Lithography, Deposition, and Processing to Realize Complex 3D Magnetic Nanostructures

Advanced Functional Materials, EarlyView.
Two‐photon lithography (TPL) enables 3D magnetic nanostructures with unmatched freedom in geometry and material choice. Advances in voxel control, deposition, and functionalization open pathways to artificial spin ices, racetracks, microrobots, and a number of additional technological applications.
Joseph Askey, Arjen van den Berg, Sandra Ruiz Gomez, Claire Donnelly, Dirk Grundler, Sam Ladak   +5 more
wiley   +1 more source

Two‐Dimensional Materials as a Multiproperty Sensing Platform

Advanced Functional Materials, EarlyView.
Various sensing modalities enabled and/or enhanced by two‐dimensional (2D) materials are reviewed. The domains considered for sensing include: 1) optoelectronics, 2) quantum defects, 3) scanning probe microscopy, 4) nanomechanics, and 5) bio‐ and chemosensing.
Dipankar Jana, Shubhrasish Mukherjee, Dmitrii Litvinov, Magdalena Grzeszczyk, Sergey Grebenchuk, Makars Šiškins, Virgil Gavriliuc, Yihang Ouyang, Changyi Chen, Yuxuan Ye, Meng Yiming, Maciej Koperski   +11 more
wiley   +1 more source

Magnetic anisotropy energy of ferromagnetic shape memory alloys Ni2X(X=Fe, Co)Ga by first-principles calculations

AIP Advances, 2017
First-principles calculations were employed to explore magnetocrystalline anisotropy energy (MAE) of Ni2X(X=Fe, Co)Ga alloys. The MAE of Ni2FeGa is found to show a concave behavior as a function of tetragonal distortion and easy-axis of magnetization in ...
Wangqiang He, Xingqiao Ma, Zhuhong Liu, Yi Wang, Long-Qing Chen   +4 more
doaj   +1 more source

Contributions to the Transformation Entropy Change and Influencing Factors in Metamagnetic Ni-Co-Mn-Ga Shape Memory Alloys

Entropy, 2014
Ni-Co-Mn-Ga ferromagnetic shape memory alloys show metamagnetic transition from ferromagnetic austenite to paramagnetic (or weak-magnetic) martensite for a limited range of Co contents.
Concepció Seguí, Eduard Cesari
doaj   +1 more source

Investigations of Shape Deformation Behaviors of the Ferromagnetic Ni–Mn–Ga Alloy/Porous Silicone Rubber Composite towards Actuator Applications

Micromachines, 2023
Ferromagnetic shape memory alloys (FSMAs), which are potential candidates for future technologies (i.e., actuators in robots), have been paid much attention for their high work per volume and rapid response as external stimulation, such as a magnetic ...
Wan-Ting Chiu, Yui Watanabe, Masaki Tahara, Tomonari Inamura, Hideki Hosoda   +4 more
doaj   +1 more source

Unprecedented Spin‐Lifetime of Itinerant Electrons in Natural Graphite Crystals

Advanced Functional Materials, EarlyView.
Graphite exhibits extraordinary spintronic potential, with electron spin lifetimes reaching 1,000 ns at room temperature ‐ over 100 times longer than graphene‐based devices. Magnetic resonance spectroscopy reveals strong anisotropy: out‐of‐plane spins live 50 times longer than their in‐plane counterparts.
Bence G. Márkus, Dávid Beke, Lili Vajtai, András Jánossy, László Forró, Ferenc Simon   +5 more
wiley   +1 more source

Thermal and structural properties of the martensitic transformations in Fe7Pd3 shape memory alloys: an ab initio-based molecular dynamics study

New Journal of Physics, 2019
Ferromagnetic shape memory alloys, including the Fe _7 Pd _3 system, constitute an upcoming class of functional materials, whose atomic-scale physical foundations are still insufficiently understood.
Alexander Holm, Stefan G Mayr
doaj   +1 more source

Manipulation of the Martensitic Transformation and Exchange Bias Effect in the Ni₄₅Co₅Mn₃₇In₁₃ Ferromagnetic Shape Memory Alloy Films

Magnetochemistry, 2023
The martensitic phase transition and exchange bias effect of the Ni-Mn-based ferromagnetic shape memory alloys (FSMAs) Ni45Co5Mn37In13 (Ni-Co-Mn-In) films are investigated in this paper.
Jiahong Wen, Bochu Yang, Zhichao Dong, Yaxin Yan, Xiaoyu Zhao   +4 more
doaj   +1 more source