EFFECT OF THE GRAIN-SIZE ON THE TUNNEL DISTRIBUTION IN (NH4)2ZNCL4

: LIU ZS, PUNKKINEN M, VUORIMAKI AH, YLINEN EE

Publisher: ELSEVIER SCIENCE BV

: 1994

: Physica B: Condensed Matter

: PHYSICA B

: 202

: 3-4

: 343

: 345

: 3

: 0921-4526

DOI: https://doi.org/10.1016/0921-4526(94)90316-6

The effect of the grain size of a polycrystalline sample on the rotational tunnelling of ammonium ions is studied in (NH4)2ZnCl4 by NMR level crossing. When a single crystal is ground to a powder of 1-2 mum grains, the width of the distribution of the tunnel splitting is observed to increase tenfold and the peak position shifts somewhat.

Physical sciences