Magnetic Properties of New Low Dimensional Spin Frustrated Systems

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Date/Time:Monday, 05 Oct 2009 from 4:10 pm to 5:10 pm
Location:Physics, Room 3
Phone:515-294-9901
Channel:Colloquium
Categories:Lectures
Actions:Download iCal/vCal | Email Reminder
Yuji Furukawa (Iowa State University)

Recent progress in synthesizing nanoscale molecular magnets provides a new platform to investigate magnetic properties of spin frustration systems with different novel structures. So-called triangular spin tube system, where spin frustrated antiferromagnetic triangles construct one dimensional chain, is one of the interesting new spin frustration system because the system has a possiblity to show new quantum phenomena due to a degree of freedom of spin chirality and the one dimensional spin nature. Another interesting system is "spin ball" systems which has a spherical shape constructed from twenty antiferromagnetic triangles with spin frustration. In this talk, I will present recent our results of NMR and magnetization measurements for two new magnetic systems;
(1) twisted triangular spin tube ([(CuCltanchH)3Cl]Cl2) in which AF triangle formed by three Cu2+ (s=1/2) ions are aligned to construct one dimensional chain, (2) spin ball systems (Mo72M30O252(Mo2O7(H2O))2)(M=Fe3+(S=5/2),
Cr3+(S=3/2) and V4+ (S=1/2))).