Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: K1.00172 : Deuterated vs Normal Hydrogen Magnetism of M (Mn,Co) Dichloride Monohydrate, and Crystal Structure
Author:
Presented here are susceptibility data for fully deuterated forms
of the title materials, and comparison with normal hydrogen
forms. Also shown is the first structure determination for any
monohydrate compound, for the Mn system with the simplest
magnetic behavior to analyze. Interesting similarities and
contrasts appear relative to normal hydrogen analogs. For the Co
system the location of an enhanced susceptibility maximum, and
its magnitude, match very well those of the normal hydrogen form.
The deuterated Mn material shows a similar very broad
susceptibility maximum as normal material, implying
low-dimensional (probably d=1) magnetism, and with indication of
a transition somewhat below T(max), presumably due to weak
interchain interactions. But, the location of the maximum is at
significantly lower temperature than in normal material, and the
size is larger; both findings suggest a weaker intrachain
interaction. Yet, the apparent transition, near 2.17 K, differs
hardly at all in location from that in the normal material. The
crystal structure determination for the normal Mn system provides
the first evidence of a structural reason for the low dimensional
magnetism observed, in that somewhat isolated magnetic chains are
apparent.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.K1.172
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