2011 Fiscal Year Final Research Report
Study of novel quantum phenomenon by neutron scattering
Project/Area Number |
22740234
|
Research Category |
Grant-in-Aid for Young Scientists (B)
|
Allocation Type | Single-year Grants |
Research Field |
Condensed matter physics II
|
Research Institution | The University of Tokyo |
Principal Investigator |
|
Project Period (FY) |
2010 – 2011
|
Keywords | 中性子散乱 / 磁性 / 量子スピン / 量子現象 |
Research Abstract |
Spin dynamics of the square lattice Heisenberg antiferromagnet, Ba_2MnGe_2O_7, is studied by a combination of bulk measurements, neutron diffraction, and inelastic neutron-scattering techniques. Easy plane type antiferromagnetic order is identified at T=4. 0 K. The exchange interactions are estimated as J_1=27μeV and J_2=1. 0μeV, and the saturation field H_c is 9. 75 T. Magnetic excitation measurements with high experimental resolution setup by triple axis neutron spectrometer reveals the instability of one magnon excitation in the field range of 0. 7H_c<H<0. 85H_c.
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Research Products
(22 results)