Spin dynamics in stripe-ordered La5/3Sr1/3NiO4

Autor:	Boothroyd, AT, Prabhakaran, D, Freeman, PG, Lister, SJS, Enderle, M, Hiess, A, Kulda, J
Jazyk:	angličtina
Rok vydání:	2016
Předmět:	Condensed Matter - Strongly Correlated Electrons Strongly Correlated Electrons (cond-mat.str-el) FOS: Physical sciences Condensed Matter::Strongly Correlated Electrons
Popis:	Polarized and unpolarized neutron inelastic scattering has been used to measure the spin excitations in the spin-charge-ordered stripe phase of La5/3Sr1/3NiO4. At high energies, sharp magnetic modes are observed characteristic of a static stripe lattice. The energy spectrum is described well by a linear spin wave model with intra- and inter-stripe exchange interactions between neighbouring Ni spins given by J = 15 +/- 1.5 meV and J' = 7.5 +/- 1.5 meV respectively. A pronounced broadening of the magnetic fluctuations in a band between 10 meV and 25 meV is suggestive of coupling to collective motions of the stripe domain walls. ReVTeX 4, 4 pages inc. 4 Figs
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f163788d166242d39222847a5aa79305 https://ora.ox.ac.uk/objects/uuid:fcd4e6c2-99e4-444a-a611-cf51cfe778b1 Zobrazit plný text záznamu