Investigation of possible magnetic fragmentation of a new rare earth pyrochlore Nd2Hf2O7
We plan to perform diffuse scattering measurements on the large single crystal Nd2Hf2O7 by using the direct geometry Time of Flight spectrometer IN5. The magnetic moment is highly anisotropic with a value that reflects strong quantum fluctuations in the ground state, while magnetization measurements suggest weak FM coupling of Nd spins, in spite of an AFM transition at T=0.55K. The inelastic neutron scattering at base temperature will provide information about the allegations that it is a system with magnetic moment fragmentation. We wish also to determine the Hamiltonian by fitting the expected spin wave excitations to extract the couplings that will provide us with a better understanding of Nd2Hf2O7 ground state. Furthermore we plan to measure the neutron scattering at a temperature above TN in order to shed light onto the possible formation of a Coulomb phase which may make Nd2Hf2O7 a candidate for the observation of a Higgs transition.
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SAMARTZIS Alexandros; V K Anand; ISLAM A T M Nazmul; Bella Lake; OLLIVIER Jacques and XU Jianhui. (2017). Investigation of possible magnetic fragmentation of a new rare earth pyrochlore Nd2Hf2O7. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1533
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