Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Frost, CD"'
Autor:
Woo, HJ, Boothroyd, AT, Nakajima, K, Perring, TG, Frost, CD, Freeman, PG, Prabhakaran, D, Yamada, K, Tranquada, JM
Using the MAPS spectrometer at the ISIS spallation source, we have measured the magnetic excitations of single-crystal samples of stripe-ordered La2-x Srx Ni O4 with x=0.333 and 0.275. The full two-dimensional spin-wave dispersions were obtained usin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::81923abb9b533fb4577f17e167ce024b
https://ora.ox.ac.uk/objects/uuid:ceb817d9-9b92-4489-9521-fab876781458
https://ora.ox.ac.uk/objects/uuid:ceb817d9-9b92-4489-9521-fab876781458
The incommensurate magnetic excitations of spin-charge ordered La2NiO4.11 were studied by inelastic neutron scattering. With increasing energy up to similar to 20meV the maximum intensity of the spin excitations is observed to shift slightly towards
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::42adfc89aa52e73ef3b09dacda8a04a3
https://doi.org/10.1016/j.jmmm.2006.10.488
https://doi.org/10.1016/j.jmmm.2006.10.488
We report inelastic neutron scattering results that reveal an hour-glass magnetic excitation spectrum in La1.75Sr0.25CoO 4. The magnetic spectrum is similar to that observed previously in La1.67Sr0.33CoO4, but the spectral features are broader. We sh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::f1c6118e420ad079602d02a1553a8234
https://ora.ox.ac.uk/objects/uuid:20c4d656-472c-4383-8b02-ebfae6ffa3cc
https://ora.ox.ac.uk/objects/uuid:20c4d656-472c-4383-8b02-ebfae6ffa3cc
We report measurements of the magnetic excitation spectrum of the layered antiferromagnet La2CoO4 by time-of-flight neutron inelastic scattering. In the energy range probed in our experiments (0-250 meV) the magnetic spectrum consists of spin-wave mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::830f87ccec19f2c997a7854eb659c88f
http://arxiv.org/abs/1009.5913
http://arxiv.org/abs/1009.5913
Autor:
Helme, LM, Boothroyd, AT, Coldea, R, Prabhakaran, D, Frost, CD, Keen, DA, Regnault, LP, Freeman, PG, Enderle, M, Kulda, J
We describe neutron scattering experiments performed to investigate the magnetic order and dynamics of half-doped La1.5Sr0.5CoO4. This layered perovskite exhibits a near-ideal checkerboard pattern of Co2+/Co3+ charge order at temperatures below ~ 800
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e6238baf386924117747a6ce539e2a99
http://arxiv.org/abs/0909.4964
http://arxiv.org/abs/0909.4964
Autor:
Boothroyd, AT, Freeman, PG, Prabhakaran, D, Woo, H, Nakajima, K, Tranquada, JM, Yamada, K, Frost, CD
We report neutron scattering measurements of the spectrum of magnetic excitations in the stripe-ordered phase of La2-xSrxNiO4 (x=0.275 and 1/3). The propagating spin excitations follow a similar dispersion relation for the two compositions, but the l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d2dc4fe4c14372f9425158dc5272b95
The magnetic excitations of the square-lattice spin-1/2 antiferromagnet and high-Tc parent La2CuO4 are determined using high-resolution inelastic neutron scattering. Sharp spin waves with absolute intensities in agreement with theory including quantu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c26dbb3fb662dcf45578bb919c6be29a
http://arxiv.org/abs/cond-mat/0006384
http://arxiv.org/abs/cond-mat/0006384
Publikováno v:
IndraStra Global.
Archean supracrustal sequences of pelitic, quartzitic, calcareous and mafic compositions in the central Laramie Mountains, Wyoming, have been affected by two metamorphic events: a 1.78 Ga amphibolite-grade regional metamorphism, and a 1.43 Ga contact
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=issn23813652::2749b47aa58445f7a3f7a5b83a9253e8
https://igi.indrastra.com/items/show/46092
https://igi.indrastra.com/items/show/46092
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