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We present synchrotron x-ray diffraction, neutron powder diffraction and time-of-flight inelastic neutron scattering measurements on the rare earth pyrochlore oxide Nd2Zr2O7 to study the ordered state magnetic structure and cystal field…

Strongly Correlated Electrons · Physics 2016-01-20 J. Xu , V. K. Anand , A. K. Bera , M. Frontzek , D. L. Abernathy , N. Casati , K. Siemensmeyer , B. Lake

We document the coexistence of ferro- and anti-ferromagnetism in pyrochlore $\rm Yb_2Ti_2O_7$ using three neutron scattering techniques on stoichiometric crystals: elastic neutron scattering shows a canted ferromagnetic ground state,…

Strongly Correlated Electrons · Physics 2020-10-27 A. Scheie , J. Kindervater , S. Zhang , H. J. Changlani , G. Sala , G. Ehlers , A. Heinemann , G. S. Tucker , S. M. Koohpayeh , C. Broholm

Nd2Hf2O7, belonging to the family of geometrically frustrated cubic rare earth pyrochlore oxides, was recently identified to order antiferromagnetically below T_N = 0.55 K with an all-in/all-out arrangement of Nd3+ moments, however with a…

Strongly Correlated Electrons · Physics 2017-12-15 V. K. Anand , D. L. Abernathy , D. T. Adroja , A. D. Hillier , P. K. Biswas , B. Lake

We report a combined muon spin relaxation/rotation, bulk magnetization, neutron scattering, and transport study of the electronic properties of the pyrochlore iridate Nd2Ir2O7. We observe the onset of strongly hysteretic behavior in the…

The magnetic and quadrupolar ordered states of polycrystalline YbRu2Ge2 have been investigated using zero-field muon spin relaxation ({\mu}SR) and neutron diffraction measurements. Specific heat measurements show three successive phase…

Strongly Correlated Electrons · Physics 2015-05-30 H. S. Jeevan , D. T. Adroja , A. D. Hillier , Z. Hossain , C. Ritter , C. Geibel

We present results from muon spin relaxation/rotation, magnetization, neutron scattering and transport measurements on polycrystalline samples of the pyrochlore iridates Y2Ir2O7 (Y-227) and Yb2Ir2O7 (Yb-227). Well-defined spontaneous…

Strongly Correlated Electrons · Physics 2012-08-08 S. M. Disseler , Chetan Dhital , A. Amato , S. R. Giblin , Clarina de la Cruz , Stephen D. Wilson , M. J. Graf

We report an extensive study on the zero field ground state of a powder sample of the pyrochlore $\mathrm{Yb_2Ti_2O_7}$. A sharp heat capacity anomaly that labels a low temperature phase transition in this material is observed at 280 mK.…

Comprehensive muon spin rotation/relaxation (muSR) and neutron powder diffraction (NPD) studies supported via bulk measurements have been performed on the ordered double perovskite Sr2YbRuO6 to investigate the nature of the magnetic ground…

Elastic neutron scattering, ac susceptibility, and specific heat experiments on the pyrochlores Er$_{2}$Ge$_{2}$O$_{7}$ and Yb$_{2}$Ge$_{2}$O$_{7}$ show that both systems are antiferromagnetically ordered in the $\Gamma_5$ manifold. The…

Strongly Correlated Electrons · Physics 2015-10-12 Z. L. Dun , X. Li , R. S. Freitas , E. Arrighi , C. R. Dela Cruz , M. Lee , E. S. Choi , H. B. Cao , H. J. Silverstein , C. R. Wiebe , J. G. Cheng , H. D. Zhou

We study magnetic behaviour of the Yb$^{3+}$ ions on a frustrated pyrochlore lattice in the spinel {\CYS}. The crystal-electric field parameters deduced from high-energy inelastic neutron scattering reveal well-isolated ytterbium ground…

Strongly Correlated Electrons · Physics 2019-09-18 K. Guratinder , Jeffrey G. Rau , V. Tsurkan , C. Ritter , J. Embs , T. Fennell , H. C. Walker , M. Medarde , T. Shang , A. Cervellino , Ch. Rüegg , O. Zaharko

The magnetic ground state of double perovskite Sr2DyRuO6 has been investigated using muon spin rotation and relaxation (muSR), neutron powder diffraction (NPD) and inelastic neutron scattering (INS), in addition to heat capacity and…

Strongly Correlated Electrons · Physics 2020-03-19 D. T. Adroja , Shivani Sharma , C. Ritter , A. D. Hillier , C. V. Tomy , R. Singh , R. I. Smith , M. Koza , A. Sundaresan , S. Langridge

We report neutron diffraction measurements of the magnetic structures in two pyrochlore iridates, Yb2Ir2O7 and Lu2Ir2O7. Both samples exhibit the all-in-all-out magnetic structure on the Ir4+ sites below TN~ 150,K, with a low temperature…

Inelastic neutron scattering measurement is performed on a breathing pyrochlore antiferromagnet Ba3Yb2Zn5O11. The observed dispersionless excitations are explained by a crystalline electric field (CEF) Hamiltonian of Kramers ion Yb3+ of…

Materials Science · Physics 2016-03-03 T. Haku , M. Soda , M. Sera , K. Kimura , S. Itoh , T. Yokoo , T. Masuda

We report inelastic neutron scattering measurements from our newly synthesized single crystals of the structurally metastable antiferromagnetic pyrochlore Yb$_{2}$Ge$_{2}$O$_{7}$. We determine the four symmetry-allowed nearest-neighbor…

We report low temperature specific heat and muon spin relaxation/rotation ($\mu$SR) measurements on both polycrystalline and single crystal samples of the pyrochlore magnet Yb$_2$Ti$_2$O$_7$. This system is believed to possess a spin…

We report synchrotron radiation diffraction and muon spin rotation (muSR) measurements on the frustrated pyrochlore magnet Tb2Ti2O7. The powder diffraction study of a crushed crystal fragment does not reveal any structural change down to 4…

Strongly Correlated Electrons · Physics 2014-12-22 P. Dalmas de Reotier , A. Yaouanc , A. Bertin , C. Marin , S. Vanishri , D. Sheptyakov , A. Cervellino , B. Roessli , C. Baines

We report detailed measurements of the low temperature magnetic phase diagram of Er$_2$Ti$_2$O$_7$. Heat capacity and time-of-flight neutron scattering studies of single crystals, subject to magnetic fields applied along the…

Strongly Correlated Electrons · Physics 2012-07-16 J. P. C. Ruff , J. P. Clancy , A. Bourque , M. A. White , M. Ramazanoglu , J. S. Gardner , Y. Qiu , J. R. D. Copley , H. A. Dabkowska , B. D. Gaulin

We present time-of-flight inelastic neutron scattering measurements at low temperature on powder samples of the magnetic pyrochlore oxides Tb2Ti2O7 and Tb2Sn2O7. These two materials possess related, but different ground states, with…

Strongly Correlated Electrons · Physics 2014-05-01 J. Zhang , K. Fritsch , Z. Hao , B. V. Bagheri , M. J. P. Gingras , G. E. Granroth , P. Jiramongkolchai , R. J. Cava , B. D. Gaulin

We present an interpretation of zero field diffuse neutron scattering and of high field magnetisation data at very low temperature in the frustrated pyrochlore system Tb2Ti2O7. This material has antiferromagnetic exchange interactions and…

Strongly Correlated Electrons · Physics 2013-12-16 P. Bonville , A. Gukasov , I. Mirebeau , S. Petit

We present high-resolution single crystal time-of-flight neutron scattering measurements on the candidate quantum spin liquid pyrochlore Tb2Ti2O7 at low temperature and in a magnetic field. At ~70 mK and in zero field, Tb2Ti2O7 reveals…

Strongly Correlated Electrons · Physics 2013-04-16 K. Fritsch , K. A. Ross , Y. Qiu , J. R. D. Copley , T. Guidi , R. I. Bewley , H. A. Dabkowska , B. D. Gaulin
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