ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Among systems of the type Mn(SCN)2(ROH)2, where R=CH3, C2H5, i-C3H7, or n-C3H7, only the title compound with R=i-C3H7 fails to exhibit a magnetic ordering transition in the vicinity of 10 K. As with the other members of this series, superexchange interactions between manganese ions are mediated by bridging thiocyanate ions, but for the isopropanol compound a distinctly different type of bridging network is revealed by a crystal structure determination.1 The structure, presented and described in detail, is monoclinic, P21/n, Z=2 with a=11.584(2) A(ring), b=5.781(1) A(ring), c=11.163(2) A(ring), and β=111.86(1)°. Only along the b axis do efficient thiocyanate superexchange bridges occur, so that magnetically one-dimensional behavior can be anticipated. This is evident in susceptibility measurements, which reveal a broad maximum near 16 K and which can be fit reasonably well assuming one-dimensional antiferromagnetic Heisenberg model behavior. A magnetic anisotropy of a few percent is also evident in the single-crystal susceptibility. No magnetic ordering appears to occur down to a temperature of about 1.65 K.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.345995
