Zobrazeno 1 - 10
of 663
pro vyhledávání: '"Stewart, J R"'
Autor:
Facheris, L., Nabi, S. D., Povarov, K. Yu., Yan, Z., Moshe, A. Glezer, Nagel, U., Rõõm, T., Podlesnyak, A., Ressouche, E., Beauvois, K., Stewart, J. R., Manuel, P., Khalyavin, D., Orlandi, F., Zheludev, A.
Magnetic structures and spin excitations are studied across the phase diagram of the geometrically frustrated S = 3/2 quantum antiferromagnet Cs2CoBr4 in magnetic fields applied along the magnetic easy axis, using neutron diffraction, inelastic neutr
Externí odkaz:
http://arxiv.org/abs/2311.10535
Autor:
Facheris, L., Nabi, S. D., Moshe, A. Glezer, Nagel, U., Rõõm, T., Povarov, K. Yu., Stewart, J. R., Yan, Z., Zheludev, A.
Publikováno v:
Phys. Rev. Lett. 130, 256702 (2023)
High-resolution neutron and THz spectroscopies are used to study the magnetic excitation spectrum of Cs$_2$CoBr$_4$, a distorted-triangular-lattice antiferromagnet with nearly XY-type anisotropy. What was previously thought of as a broad excitation c
Externí odkaz:
http://arxiv.org/abs/2301.13596
Autor:
Wildes, A. R., Fåk, B., Hansen, U. B., Enderle, M., Stewart, J. R., Testa, L., Rønnow, H. M., Kim, C., Park, Je-Geun
The spin waves in single crystals of the layered van der Waals antiferromagnet CoPS$_3$ have been measured using inelastic neutron scattering. The data show four distinct spin wave branches with large ($\gtrsim 14$ meV) energy gaps at the Brillouin z
Externí odkaz:
http://arxiv.org/abs/2212.06479
Autor:
Georgopoulou, M., Fåk, B., Boldrin, D., Stewart, J. R., Ritter, C., Suard, E., Ollivier, J., Wills, A. S.
Neutron scattering measurements have been performed on deuterated powder samples of claringbullite and Zn-doped claringbullite (Zn$_x$Cu$_{4-x}$(OD)$_{6}$FCl). At low temperatures, claringbullite Cu$_4$(OD)$_{6}$FCl forms a distorted pyrochlore latti
Externí odkaz:
http://arxiv.org/abs/2211.08072
Neutron spectroscopy measurements have been performed on single crystals of the antiferromagnetic van der Waals compound NiPS$_3$. Linear spin wave theory using a Heisenberg Hamiltonian with single-ion anisotropies has been applied to determine the m
Externí odkaz:
http://arxiv.org/abs/2207.07448
Publikováno v:
Phys. Rev. B 105, 014410 (2022)
The microscopic spin-spin correlations in the 2D layered spin-1 honeycomb lattice compound Na2Ni2TeO6 have been investigated by neutron diffraction and inelastic neutron scattering. The honeycomb lattice of spin-1 Ni2+ ions, within the crystallograph
Externí odkaz:
http://arxiv.org/abs/2202.08015
Autor:
Kademane, A. Bhat, Quintero-Castro, D. L., Siemensmeyer, K., Salazar-Mejia, C., Gorbunov, D., Stewart, J. R., Luetkens, H., Baines, C., Li, Haifeng
The single ion properties of the zig-zag chain compound SrTm$_2$O$_4$ have been investigated using heat capacity, magnetic susceptibility, magnetization, inelastic neutron scattering, and polarized muon spectroscopy. Two crystal field models are empl
Externí odkaz:
http://arxiv.org/abs/2106.03704
Autor:
Ewings, R. A., Stewart, J. R., Perring, T. G., Bewley, R. I., Le, M. D., Raspino, D., Pooley, D. E., Škoro, G., Waller, S. P., Zacek, D., Smith, C. A., Riehl-Shaw, R. C.
Publikováno v:
Rev. Sci. Instrum. 90, 035110 (2019)
The MAPS direct geometry time-of-flight chopper spectrometer at the ISIS pulsed neutron and muon source has been in operation since 1999 and its novel use of a large array of position-sensitive neutron detectors paved the way for a later generations
Externí odkaz:
http://arxiv.org/abs/1812.08583
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