Phonons and magnons in stripe-ordered nickelates. A Raman scattering study

Phonons and magnons in stripe-ordered nickelates. A Raman scattering study

Gnezdilov, V. ; Kurnosov, V. ; Pashkevich, Yu. ; Lemmens, P. ; Tranquada, J. ; Choi, K.-Y. ; Güntherodt, G. ; Nakajima, K. ; Yeremenko, A.

Тема: Низкотемпеpатуpный магнетизм

Інший ID: PACS: 72.10.Di, 71.27.+a, 78.30.–j

URI: http://dspace.nbuv.gov.ua/handle/123456789/121393

Посилання: Phonons and magnons in stripe-ordered nickelates. A Raman scattering study / V. Gnezdilov, V. Kurnosov, Yu. Pashkevich, P. Lemmens, J. Tranquada, K.-Y. Choi, G. Güntherodt, K. Nakajima, A. Yeremenko // Физика низких температур. — 2005. — Т. 31, № 2. — С. 205-212. — Бібліогр.: 39 назв. — англ.

Підтримка: This work was supported by NATO Collaborative Linkage Grant PST.CLG.977766, INTAS Grant 96-0410, and Ukrainian Grant №3-026.

Дата: 2005

Завантажень: 513

Phonons and magnons in stripe-ordered nickelates. A Raman scattering study

Анотація:

Electronic correlation effects in La₂-xSrxNiO₄ (x = 1/3 and 0.225) lead to spontaneous phase separation into microscopic spin/charge stripes with commensurate and incommensurate order, respectively. Raman scattering experiments on such single crystalline materials show a rich phenomenology of phonon and magnon anomalies due to the new, self-organized periodicities. These effects are observable as function of temperature but can also be induced by cooling in a seemingly small magnetic field leading to a reorganization of stripe structure.

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