Results 71 to 80 of about 8,007 (208)

High Thermoelectric Figure of Merit by Resonant Dopant in Half-Heusler Alloys

, 2017
Half-Heusler alloys have been one of the benchmark high temperature thermoelectric materials owing to their thermal stability and promising figure of merit ZT. Simonson et al. early showed that small amounts of vanadium doped in Hf0.75Zr0.25NiSn enhanced
Chen, Long, He, Jian, Liu, Yamei, Poon, S. Joseph, Tritt, Terry M.   +4 more
core   +2 more sources

Accelerated Screening of Halide Double Perovskites via Hybrid Density Functional Theory and Machine Learning for Thermoelectric Energy Conversion

Advanced Energy and Sustainability Research, EarlyView.
This study integrates hybrid density functional theory, Boltzmann transport theory, and machine learning to accelerate the discovery of lead‐free halide double perovskites for thermoelectric energy conversion. By screening 102 compounds, the authors identify high‐performing candidates such as Rb2GeI6 and Cs2SnBr6, offering a sustainable pathway toward ...
Souraya Goumri‐Said, Ghouti Abdellaoui, Mohammed Benali Kanoun   +2 more
wiley   +1 more source

Dataset on density functional theory investigation of ternary Heusler alloys

Data in Brief
This paper contains data and results from Density Functional Theory (DFT) investigation of 423 distinct X2YZ ternary full Heusler alloys, where X and Y represent elements from the D-block of the periodic table and Z signifies element from main group. The
Ridwan Nahar, Ka Ming Law, Thomas Roden, Michael Zengel, Justin Lewis, Sujan Budhathoki, Riley Nold, Harshil Avlani, Babajide Akintunde, Naomi Derksen, Adam J. Hauser   +10 more
doaj   +1 more source

Co-based full heusler alloy nanowires: Modulation of static and dynamic properties through deposition parameters

AIP Advances, 2019
In this work, a successful fabrication of Co2MnAl heusler alloy nanowires in anodic alumina templates has been demonstrated using simple and low-cost electro-deposition technique at room temperature.
Monika Sharma, Anindita Das, Bijoy K. Kuanr   +2 more
doaj   +1 more source

Introduction to half-metallic Heusler alloys: Electronic Structure and Magnetic Properties

, 2005
Intermetallic Heusler alloys are amongst the most attractive half-metallic systems due to the high Curie temperatures and the structural similarity to the binary semiconductors.
Galanakis I, Galanakis I, Hedin L, Heusler F, Horne M, I Galanakis, Ishida S, Kirillova M N, Ležaić M, Ležaić M Mavropoulos Ph Enkovaara J Bihlmayer G Blügel S, Lue C S, Mavropoulos Ph, Mavropoulos Ph, Nagao K, Nanda B R K, Nanda B R K, P H Dederichs, Papanikolaou N, Pendl W, Ph Mavropoulos, Shirai M Miura Y Nagao K, Tobola J, Webster P J, Xu Y Q, Zeller R, Zhang M   +25 more
core   +2 more sources

Isoelectronic Alloying in Zintl Phases Mediated the Avoided Crossing and Phonon Softening

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A small amount of Hf doping endows Zr3Ni3Sb4‐Zintl with an unusually low thermal conductivity far exceeding that of similar systems. Two unique phonon mechanisms—avoided crossing and phonon softening—significantly suppress the lattice thermal conductivity. The average thermoelectric figure of merit is improved by 21%.
Zesong Wang, Xiang Wei, Ran Guo, Shun Han, Weihong Gao, Yu‐dong Fu, Zihang Liu   +6 more
wiley   +1 more source

Balancing the Competing Effects of Carrier and Phonon Transport Mechanisms to Enhance the Thermoelectric Properties of p‐Type Ti2Zr2−xHf2Nb2Fe5.6Ni2.4Sb8 Double Half‐Heusler Alloys via Cation Vacancy Engineering

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
By designing Zr vacancy‐filled p‐type Ti2Zr2Hf2Nb2Fe5.6Ni2.4Sb8‐based thermoelectric materials, multi‐physics mechanisms and multi‐scale microstructural defects are induced to optimize electrical properties and phonon transport while suppressing the bipolar diffusion effect.
Chaoyue Wang, Mina Zhang, Longjun He, Shengpan Kan, Ruyan Song, Degang Zhao, Jinghao Li, Daoyong Cong, Xianglin Zhou   +8 more
wiley   +1 more source

Inverted spin polarization of Heusler alloys for new spintronic devices

, 2006
A new magnetic logic overcomes the major limitations of field programmable gate arrays while having a 50% smaller unit cell than conventional designs utilizing magnetic tunnel junctions with one Heusler alloy electrode.
Ebert, Hubert, Ebke, Daniel, Huetten, Andreas, Liu, Ning-Ning, Meyners, Dirk, Reiss, Guenter, Sacher, Marc D., Schmalhorst, Jan, Thomas, Andy   +8 more
core   +1 more source

Heusler Alloys: A Group of Novel Catalysts

ACS Omega, 2017
In this study, we investigated the catalytic properties of various Heusler alloys for the hydrogenation of propyne and the oxidation of carbon monoxide. For propyne hydrogenation, Co2FeGe alloy showed a higher activity than that of elemental Co, where neither Fe nor Ge showed any activity. This clearly indicates an alloying effect. For the oxidation of
Takayuki Kojima, Satoshi Kameoka, An-Pang Tsai   +2 more
openaire   +3 more sources

Fabrication‐Driven Oxidation Pathways in Y/Hf‐Modified High‐Entropy Alloys: From Elemental Segregation to Oxide Homogeneity

Rare Metals, EarlyView.
ABSTRACT This study elucidates the oxidation mechanisms governing Y/Hf‐doped AlCoCrFeNiTi high‐entropy alloys (HEAs) and reveals the pivotal role of fabrication processes in dictating high‐temperature oxidation behavior. We demonstrate that casting and spark plasma sintering (SPS) promote Y/Hf segregation, resulting in heterogeneous oxide formation and
Huaqing Yi, Jiapeng Zheng, Jiawen Zhang, Yi Yang, Binbin He, Wenjun Lu   +5 more
wiley   +1 more source