μSR study of magnetic order in the organic quasi-one-dimensional ferromagnet F4BImNN

被引：21
|
作者：
Blundell, Stephen J. [1 ]
Moeller, Johannes S. [1 ]
Lancaster, Tom [2 ]
Baker, Peter J. [3 ]
Pratt, Francis L. [3 ]
Seber, Gonca [4 ]
Lahti, Paul M. [4 ]
机构：
[1] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England
[2] Univ Durham, Ctr Phys Mat, Durham DH1 3LE, England
[3] ISIS Facil, STFC Rutherford Appleton Lab, Chilton OX11 0QX, Oxon, England
[4] Univ Massachusetts, Dept Chem, Amherst, MA 01003 USA
来源：
PHYSICAL REVIEW B | 2013年 / 88卷 / 06期
基金：
美国国家科学基金会; 英国工程与自然科学研究理事会;
关键词：
NITROPHENYL NITRONYL NITROXIDE; (C6H11NH3)CUCL3 CHAC; QUANTUM STATISTICS; MOLECULAR MAGNETS; BEHAVIOR; RADICALS; CRYSTAL; TRANSITION; EXCHANGE; CHLORIDE;
D O I：
10.1103/PhysRevB.88.064423
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The stable organic radical 2-(4,5,6,7-tetrafluorobenzimidazol-2-yl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxide-1-oxyl (F4BImNN) forms hydrogen-bonded chains in the solid state and exhibits one-dimensional ferromagnetic exchange with J/k(B) = 22 K. We use muon-spin rotation to demonstrate that weak interchain interactions drive the system to long-range magnetic order below T-c = 0.72 K. We use density-functional calculations of the muon site and compare our results to those obtained on the nonfluorinated analog compound. Our results show that F4BImNN is the best realization of a one-dimensional Heisenberg ferromagnet among purely organic compounds yet discovered.
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页数：6
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