Neutron scattering study of the layered Ising magnet CsDy(MoO₄)₂

Neutron scattering study of the layered Ising magnet CsDy(MoO₄)₂

Khatsko, E.N. ; Zheludev, A. ; Tranquada, J.M. ; Klooster, W.T. ; Knigavko, A.M. ; Srivastava, R.C.

Тема: Низкотемпеpатуpный магнетизм

Інший ID: PACS: 61.12.–q

URI: http://dspace.nbuv.gov.ua/handle/123456789/119444

Посилання: Neutron scattering study of the layered Ising magnet CsDy(MoO₄)₂ / E.N. Khatsko, A. Zheludev, J.M. Tranquada, W.T. Klooster, A.M. Knigavko, R.C. Srivastava // Физика низких температур. — 2004. — Т. 30, № 2. — С. 184-192. — Бібліогр.: 31 назв. — англ.

Підтримка: Work at ORNL and BNL was carried out under DOE Contracts No. DE-AC05-00OR22725 and DE-AC02-98CH10886, respectively.

Дата: 2004

Завантажень: 378

Neutron scattering study of the layered Ising magnet CsDy(MoO₄)₂

Анотація:

The quasi-two-dimensional antiferromagnet CsDy(MoO₄)₂ is studied by neutron diffraction and quasielastic neutron scattering. The crystal structure of two low-temperature phases (below 120 K and below 40 K) is determined. An approximate structure of the magnetically ordered phase (TN = 1.36 K) is proposed. In the ordered state the order-parameter critical exponent β = 0.17(0.01), the in-plane correlation length exponent ν = 0.94(0.07), and the staggered susceptibility critical index γ= 1.01(0.04) were determined. Comparing these results to the exact solution for a 2D Ising magnet we conclude that, although 2D behavior is apparent in CsDy(MoO₄)₂, there are deviations from the simple 2D Ising model.

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