Induced quadrupolar singlet ground state of praseodymium in a modulated pyrochlore

  title={Induced quadrupolar singlet ground state of praseodymium in a modulated pyrochlore},
  author={Joost van Duijn and K H Kim and Nam Hwi Hur and Devashibhai Thakarshibhai Adroja and F. Bridges and Aziz Daoud-Aladine and Felix Fernandez-Alonso and Roc{\'i}o Ruiz-Bustos and Jun Wen and V. Kearney and Q. Z. Huang and S. -W. Cheong and Satoru Nakatsuji and Collin L. Broholm and Toby G. Perring},
  journal={Physical Review B},
The complex structure and magnetism of Pr$_{2-x}$Bi$_x$Ru$_2$O$_7$ was investigated by neutron scattering and EXAFS. Pr has an approximate doublet ground-state and the first excited state is a singlet. This overall crystal field level scheme is similar to metallic Pr$_2$Ir$_2$O$_7$, which is also reported here. While the B-site (Ru) is well ordered throughout, this is not the case for the A-site (Pr/Bi). A distribution of the Pr-O2 bond length indicates the Pr environment is not uniform even… 
6 Citations

Phonon anomalies in pyrochlore iridates studied by Raman spectroscopy

We report polarization-resolved Raman scattering measurements on single crystals of the pyrochlore compound Eu 2 Ir 2 O 7 which exhibits a ground state with non-collinear magnetic order, as well as

Local Disorder in Ln2Ti2O7 (Ln = Gd, Tb, Dy) Pyrochlores

The temperature dependences of extended X-ray absorption fine structure (EXAFS) and X-ray absorption near edge structure (XANES) spectra of Ln2Ti2O7 (Ln = Gd, Tb, Dy) geometrically frustrated magnets

Universal geometric frustration in pyrochlores

Materials with the pyrochlore/fluorite structure have diverse technological applications, from magnetism to nuclear waste disposal. Here we report the observation of structural instability present in

Solid State Phys

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Lovesey, Theory of Neutron Scattering

    Reports RAL-TR-2011-004
  • 2011