Neutron Scattering and Magnetism

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(5FAP)2CuCl4  

Chemical formula:

(C5H6N2F)2CuCl4

Lattice type:

Monoclinic

How to grow:

Wet chemistry synthesis

Magnetic model:

S=1/2 dimer system

Why is it cool:

The most 2D non-frustrated dimer system known so far

5FAP crystal

(5FAP)2CuCl4 is another quantum magnet composed of S=1/2 antiferromagnetic dimers. However, one thing does distinguish it from the others: here the dimers naturally form a weakly coupled layers. Thus, the problems of "magnetic Bose-Einstein condensation" type can be studied in a two-dimensional setting with this material. 

5FAP_animation
(5FAP)2CuCl4 spectrum
Spectrum of magnetic excitations in (5FAP)2CuCl4, measured at a time-of-flight spectrometer LET

D. Blosser, M. Horvatić, R. Bewley, S. Gvasaliya and A. Zheludev, Dynamics and field-​induced order in the layered spin S=1/2 dimer system (C5H6N2F)2CuCl4, external page arXiv:1906.00602; external page Phys. Rev. Materials 3, 074410 (2019)

T. Hong, S. N. Gvasaliya, S. Herringer, M. M. Turnbull, C. P. Landee, L.-P. Regnault, M. Boehm, and A. Zheludev,  Dynamics of the two-​dimensional S=1/2 dimer system (C5H6N2F)2CuCl4, external page Phys. Rev. B 83, 052401 (2011)

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