Zobrazeno 1 - 10
of 534
pro vyhledávání: '"Cohen, L. F."'
Autor:
Johnson, F., Kimák, J., Zemen, J., Šobáň, Z., Schmoranzerová, E., Godinho, J., Němec, P., Beckert, S., Reichlová, H., Boldrin, D., Wunderlich, J., Cohen, L. F.
The intrinsic anomalous Nernst effect in a magnetic material is governed by the Berry curvature at the Fermi energy and can be realized in non-collinear antiferromagnets with vanishing magnetization. Thin films of (001)-oriented Mn$_{3}$NiN have thei
Externí odkaz:
http://arxiv.org/abs/2205.12014
Autor:
Morrison, K., Betouras, J. J., Venkat, G., Ewings, R. A., Caruana, A., Skokov, K., Gutfleisch, O., Cohen, L. F.
The NaZn13 type itinerant magnet LaFe13-xSix has seen considerable interest due to its unique combination of large magnetocaloric effect and low hysteresis. Here we demonstrate, with a combination of magnetometry, bespoke microcalorimetry and inelast
Externí odkaz:
http://arxiv.org/abs/2203.06010
Here we present a magnetic thin film with a weak ferrimagnetic (FIM) phase above the N\'eel temperature ($T_{N}$ = 240 K) and a non-collinear antiferromagnetic (AFM) phase below, exhibiting a small net magnetisation due to strain-associated canting o
Externí odkaz:
http://arxiv.org/abs/2111.13498
Autor:
Rogdakis, K., Sud, A., Amado, M., Lee, C. M., McKenzie-Sell, L., Jeon, K. R., Cubukcu, M., Blamire, M. G., Robinson, J. W. A., Cohen, L. F., Kurebayashi, H.
Publikováno v:
Phys. Rev. Materials 3, 014406 2019
We present measurements of ferromagnetic-resonance - driven spin pumping and inverse spin-Hall effect in NbN/Y3Fe5O12 (YIG) bilayers. A clear enhancement of the (effective) Gilbert damping constant of the thin-film YIG was observed due to the presenc
Externí odkaz:
http://arxiv.org/abs/1901.05753
Autor:
Sundar, Shyam, Salem-Sugui Jr., S., Chattopadhyay, M. K., Roy, S. B., Chandra, L. S. Sharath, Cohen, L. F., Ghivelder, L.
Publikováno v:
Supercond. Sci. Technol. 2019
We examine the evidence for multiband superconductivity and non s-wave pairing in the non-centrosymmetric superconductor Nb$_{0.18}$Re$_{0.82}$, using electrical transport, magnetization and specific heat measurements. In the normal state, both the e
Externí odkaz:
http://arxiv.org/abs/1807.04894
Autor:
Jeon, K. -R., Ciccarelli, C., Kurebayashi, H., Wunderlich, J., Cohen, L. F., Komori, S., Robinson, J. W. A., Blamire, M. G.
We quantify the spin Hall angle {\theta}SH and spin diffusion length lsd of Nb from inverse spin-Hall effect (iSHE) measurements in Nb/Ni80Fe20 bilayers under ferromagnetic resonance. By varying the Nb thickness tNb and comparing to a Ni80Fe20/Pt ref
Externí odkaz:
http://arxiv.org/abs/1805.00730
Autor:
Sundar, Shyam, Salem-Sugui Jr., S., Amorim, H. S., Wen, Hai-Hu, Yates, K. A., Cohen, L. F., Ghivelder, L.
Publikováno v:
Phys Rev. B 95, 134509 (2017
We report a detailed study of isofield magnetic relaxation and isothermal magnetization measurements with $H$$\parallel$c on an underdoped Ba$_{0.75}$K$_{0.25}$Fe$_2$As$_2$ pnictide single crystal, with superconducting transition temperature $T_c$ =
Externí odkaz:
http://arxiv.org/abs/1801.04972
Autor:
Rogdakis, K., Alfert, N., Srivastava, A., Robinson, J. W. A., Blamire, M. G., Cohen, L. F., Kurebayashi, H.
Publikováno v:
Applied Physics Express, Volume 11, Number 1 2018
Spin pumping is becoming an established method to generate voltages from magnetic dynamics. The standard detection method of spin pumping is based on open circuit voltage measurement across ferromagnetic (FM) and non-magnetic (NM) bi-layers, where th
Externí odkaz:
http://arxiv.org/abs/1709.04690
Publikováno v:
Nature Nanotechnology, 13(1):53-58 (2018)
Nanomagnetic arrays are widespread in data storage and processing. As current technologies approach fundamental limits on size and thermal stability, extracting additional functionality from arrays is crucial to advancing technological progress. One
Externí odkaz:
http://arxiv.org/abs/1704.07439
Autor:
Salem-Sugui Jr., S., Moseley, D., Stuard, S. J., Alvarenga, A. D., Sefat, A. S., Cohen, L. F., Ghivelder, L.
Publikováno v:
Journal of Alloys and Compounds 694 (2017) 1371-1375
We study the effect of proton irradiation on Ba(Fe$_{0.96}$Co$_{0.04}$)$_2$As$_2$ superconducting single crystals from combined magnetisation and magnetoresistivity measurements. The study allows the extraction of the values of the apparent pinning e
Externí odkaz:
http://arxiv.org/abs/1703.07759