Dipolar-octupolar Ising antiferromagnetism in Sm2Ti2O7 : A moment fragmentation candidate

  title={Dipolar-octupolar Ising antiferromagnetism in 
: A moment fragmentation candidate},
  author={Cole Mauws and Alannah M Hallas and Gabriele Sala and Adam A Aczel and P M Sarte and Jonathan Gaudet and D. Ziat and Jeffrey Quilliam and Joey A Lussier and Mario Bieringer and H. D. Zhou and Andrew R. Wildes and Matthew B. Stone and Douglas L. Abernathy and Graeme M Luke and Bruce D. Gaulin and Christopher R Wiebe},
  journal={Physical Review B},
Over the past two decades, the magnetic ground states of all rare earth titanate pyrochlores have been extensively studied, with the exception of Sm$_2$Ti$_2$O$_7$. This is, in large part, due to the very high absorption cross-section of naturally-occurring samarium, which renders neutron scattering infeasible. To combat this, we have grown a large, isotopically-enriched single crystal of Sm$_2$Ti$_2$O$_7$. Using inelastic neutron scattering, we determine that the crystal field ground state for… 

Figures and Tables from this paper

Intermultiplet transitions and magnetic long-range order in Sm-based pyrochlores
We present bulk and neutron scattering measurements performed on the isotopically enriched $^{154}\mathrm{Sm_2Ti_2O_7}$ and $^{154}\mathrm{Sm_2Sn_2O_7}$ samples. Both compounds display sharp heat
Quantum Spin Ice Dynamics in the Dipole-Octupole Pyrochlore Magnet Ce_{2}Zr_{2}O_{7}.
The low-energy inelastic neutron scattering measurements show a dynamic quantum spin ice state, with suppressed scattering near |Q|=0, and no long-range order at low temperatures, consistent with recent theory predicting symmetry-enriched U(1) quantum spin liquids for such DO doublets decorating the pyrochlore lattice.
Magnetic Excitations in Quantum Rare Earth Pyrochlores
Rare-earth pyrochlores are materials with chemical formula A2B2O7, where A is the rare-earth ion and B is a transition metal. At low temperature, these systems host various magnetic states such as
Quantum Spin Fragmentation in Kagome Ice Ho3Mg2Sb3O14
A promising route to realize entangled magnetic states combines geometrical frustration with quantum-tunneling effects. Spin-ice materials are canonical examples of frustration, and Ising spins in a
Extended Coulomb liquid of paired hardcore boson model on a pyrochlore lattice
There is a growing interest in the $U(1)$ Coulomb liquid in both quantum materials in pyrochlore ice and cluster Mott insulators and cold atom systems. We explore a paired hardcore boson model on a
Order out of a Coulomb Phase and Higgs Transition: Frustrated Transverse Interactions of Nd_{2}Zr_{2}O_{7}.
The pyrochlore material Nd{2}Zr_{2}O_{7} with an "all-in-all-out" (AIAO) magnetic order shows novel quantum moment fragmentation with gapped flat dynamical spin ice modes and the existence of a Coulombic phase above T_{N}.
Analytic description of spin waves in dipolar/octupolar pyrochlore magnets
  • I. Assi, S. Curnoe
  • Physics
    Journal of physics. Condensed matter : an Institute of Physics journal
  • 2021
Analytical forms for spin waves in pyrochlore magnets with dipolar-octupolar interactions, such as Nd2Zr2O7 are derived and the diagonalized magnonic Hamiltonian within the linear spin wave approximation is obtained.
Extracting quantum magnetic model parameters in a triangular rare-earth magnet: systematic characterization of crystal electric field effects from magnetic susceptibility and resonant torsion magnetometry
Christopher A. Pocs, Peter E. Siegfried, Jie Xing, Athena S. Sefat, Michael Hermele, 3 B. Normand, 5 and Minhyea Lee Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
Systematic extraction of crystal electric-field effects and quantum magnetic model parameters in triangular rare-earth magnets
Christopher A. Pocs,1 Peter E. Siegfried,1,* Jie Xing,2 Athena S. Sefat,2 Michael Hermele,1,3 B. Normand,4,5 and Minhyea Lee 1 1Department of Physics, University of Colorado, Boulder, Colorado 80309,
Recent developments of MCViNE and its applications at SNS
MCViNE is an open source, object-oriented Monte Carlo neutron ray-tracing simulation software package. Its design allows for flexible, hierarchical representations of sophisticated instrument


Effect of chemical pressure on the crystal electric field states of erbium pyrochlore magnets
We have carried out a systematic study of the crystal electric field excitations in the family of cubic pyrochlores Er$_2B_2$O$_7$, with $B=$~Ti, Ge, Pt, and Sn, using neutron spectroscopy. All
Quantum origins of moment fragmentation in Nd 2 Zr 2 O 7
Spin-liquid states are often described as the antithesis of magnetic order. Recently, however, it has been proposed that in certain frustrated magnets the magnetic degrees of freedom may ``fragment''
Magnetic Pyrochlore Oxides
Within the past 20 years or so, there has occurred an explosion of interest in the magnetic behavior of pyrochlore oxides of the type $A_{2}^{3+}$$B_{2}^{4+}$O$_{7}$ where $A$ is a rare-earth ion and
Spin dynamics of the ordered dipolar-octupolar pseudospin- 1 / 2 pyrochlore Nd 2 Zr 2 O 7 probed by muon spin relaxation
We present a muon spin relaxation study on the Ising pyrochlore ${\mathrm{Nd}}_{2}{\mathrm{Zr}}_{2}{\mathrm{O}}_{7}$ which develops an ``all-in-all-out'' magnetic order below 0.4 K. At 20 mK, far
Quantum spin ices and topological phases from dipolar-octupolar doublets on the pyrochlore lattice.
This work construct and study models of dipolar-octupolar doublets in itinerant and localized limits, and shows that the most general nearest-neighbor spin model is the XYZ model, which exhibits two distinct quantum spin ice (QSI) phases.
We report a detailed study of the pyrochlore Ho{sub 2}Ti{sub 2}O{sub 7}, in which the magnetic ions (Ho{sup 3+}) are ferromagnetically coupled with J{approximately}1 K . We show that the presence of
Nd2Sn2O7: an all-in-all-out pyrochlore magnet with no divergence-free field and anomalously slow paramagnetic spin dynamics
We report measurements performed on a polycrystalline sample of the pyrochlore compound Nd2Sn2O7. It undergoes a second order magnetic phase transition at T-c approximate to 0.91 K to a noncoplanar
Observation of long-range magnetic ordering in pyrohafnate Nd 2 Hf 2 O 7 : A neutron diffraction study
We have investigated the physical properties of a pyrochlore hafnate Nd2Hf2O7 using ac magnetic susceptibility \chi_ac(T), dc magnetic susceptibility \chi(T), isothermal magnetization M(H) and heat
Crystal-field interaction in the pyrochlore magnet Ho2Ti2O7
Neutron time-of-flight spectroscopy has been employed to study the crystal-field interaction in the pyrochlore titanate Ho2Ti2O7. The crystal-field parameters and corresponding energy-level scheme
Crystal field states of Tb3+ in the pyrochlore spin liquid Tb2Ti2O7 from neutron spectroscopy
We report time-of-flight neutron scattering measurements of the magnetic spectrum of Tb3+ in Tb2Ti2O7. The data, which extend up to 120 meV and have calibrated intensity, enable us to consolidate and