Results 131 to 140 of about 124,327 (319)

Tunnel Junction with Perpendicular Magnetic Anisotropy: Status and Challenges

Micromachines, 2015
Magnetic tunnel junction (MTJ), which arises from emerging spintronics, has the potential to become the basic component of novel memory, logic circuits, and other applications.
Mengxing Wang, Yue Zhang, Xiaoxuan Zhao, Weisheng Zhao   +3 more
doaj   +1 more source

Spin and Charge Control of Topological End States in Chiral Graphene Nanoribbons on a 2D Ferromagnet

Advanced Materials, EarlyView.
Chiral graphene nanoribbons on a ferromagnetic gadolinium‐gold surface alloy display tunable spin and charge states at their termini. Atomic work function variations and exchange fields enabe transitions between singlet, doublet, and triplet configurations.
Leonard Edens, Francisco Romero‐Lara, Trisha Sai, Kalyan Biswas, Manuel Vilas‐Varela, Thomas Frederiksen, Diego Peña, Fabian Schulz, Jose Ignacio Pascual   +8 more
wiley   +1 more source

Bolometric Properties of a Spin-Torque Diode Based on a Magnetic Tunnel Junction

Advances in Condensed Matter Physics, 2019
Spin caloritronics opens up a wide range of potential applications, one of which can be the thermoelectric rectification of a microwave signal by spin-diode structures. The bolometric properties of a spin-torque diode based on a magnetic tunnel junction (
G. D. Demin, K. A. Zvezdin, A. F. Popkov
doaj   +1 more source

Crossover from Kondo assisted suppression to co-tunneling enhancement of tunneling magnetoresistance via ferromagnetic nanodots in MgO tunnel barriers

, 2007
Recently, it has been shown that magnetic tunnel junctions with thin MgO tunnel barriers exhibit extraordinarily high tunneling magnetoresistance (TMR) values at room temperature1, 2.
Bermon S., Butler W. H., Cronenwett S. M., Ernult F., Faure-Vincent J., Fettar F., Gittleman J. I., Glazman L. I., Goldhaber-Gordon D., Goldhaber-Gordon D., Gould C., Katayama T., Kouwenhoven L., Lee Y. M., Liang W., López R., Martinek J., Martinek J., Marukame T., Milner A., Mitani S., Parkin S. S. P., Parks J. J., Pasupathy A. N., Romeike C., Romeike C., Schelp L. F., Sukegawa H., Takahashi S., van der Wiel W. G., Yakushiji K., Yakushiji K., Yuasa S., Zeller H. R.   +33 more
core   +1 more source

Resolving the Structural Duality of Graphene Grain Boundaries

Advanced Materials, EarlyView.
Cantilever ncAFM resolves the atomic structure of grain boundaries in graphene, revealing coexisting stable and metastable types. Both contain pentagon/heptagon defects, but metastable GBs show irregular geometries. Modeling shows metastable GBs form under compression, exhibiting vertical corrugation, while stable GBs are flat.
Haojie Guo, Emiliano Ventura‐Macías, Mariano D. Jiménez‐Sánchez, Nicoleta Nicoara, Pierre Mallet, Jean‐Yves Veuillen, Vincent T. Renard, Antonio J. Martínez‐Galera, Pablo Pou, Julio Gómez‐Herrero, Rubén Pérez, Iván Brihuega   +11 more
wiley   +1 more source

Spin transfer torque driven higher-order propagating spin waves in nano-contact magnetic tunnel junctions

Nature Communications, 2018
Nano-contact-based spin wave generation may enable high-frequency magnonic devices but has been limited to long wavelengths and weak signal strengths.
A. Houshang, R. Khymyn, H. Fulara, A. Gangwar, M. Haidar, S. R. Etesami, R. Ferreira, P. P. Freitas, M. Dvornik, R. K. Dumas, J. Åkerman   +10 more
doaj   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

High sensitivity microwave detection using a magnetic tunnel junction in the absence of an external applied magnetic field

, 2015
In the absence of any external applied magnetic field, we have found that a magnetic tunnel junction (MTJ) can produce a significant output direct voltage under microwave radiation at frequencies, which are far from the ferromagnetic resonance condition,
C.-M. Hu, D. Houssameddine, H. Guo, K. Wu, L. H. Bai, Pozar D. M., S. Hemour, Y. P. Zhao, Y. S. Gui, Y. Xiao   +9 more
core   +1 more source

Quantum tunneling in magnetic tunneling junctions

Revista de I + D Tecnológico, 2012
This paper reports on the study of ferromagnetic tunneling junctions produced by magnetron sputtering technique and deposited under oxidation conditions that lead to low potential barrier height, low asymmetrical barrier and quantum tunneling as the charge transport mechanism.
Cruz de Gracia, Evgeni, Strazzabosco Dorneles, Lucio, Schelp, Luiz Fernando, Ribeiro Teixiera, Sérgio, Baibich, Mario Norberto   +4 more
openaire   +2 more sources

C16 Phase High Entropy Borides With High Magnetic Anisotropy

Advanced Materials, EarlyView.
Rare‐earth‐free C16‐phase high entropy boride thin films exhibit enhanced magnetic anisotropy with coercivities surpassing their binary and ternary counterparts. Combinatorial synthesis of (Fe‐Co‐Ni‐Mn)2B films combined with density functional theory enables mapping of the magnetic properties across the composition space, revealing high entropy ...
Willie B. Beeson, Dhritiman Bhattacharya, Dinesh Bista, Bradley J. Fugetta, Gen Yin, Kai Liu   +5 more
wiley   +1 more source