Physical properties of the candidate quantum spin-ice system Pr2Hf2 O                         7

V. K. Anand; L. Opherden; J. Xu; D. T. Adroja; A. T.M.N. Islam; T. Herrmannsdörfer; J. Hornung; R. Schönemann; M. Uhlarz; H. C. Walker; N. Casati; B. Lake

doi:10.1103/PhysRevB.94.144415

Physical properties of the candidate quantum spin-ice system Pr2Hf2 O ₇

V. K. Anand, L. Opherden, J. Xu, D. T. Adroja, A. T.M.N. Islam, T. Herrmannsdörfer, J. Hornung, R. Schönemann, M. Uhlarz, H. C. Walker, N. Casati, B. Lake

Physics

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Abstract

Physical properties of a pyrohafnate compound Pr2Hf2O7 have been investigated by ac magnetic susceptibility χac(T), dc magnetic susceptibility χ(T), isothermal magnetization M(H), and heat-capacity Cp(T) measurements on polycrystalline as well as single-crystal samples combined with high-resolution synchrotron x-ray diffraction (XRD) for structural characterization and inelastic neutron scattering (INS) to determine the crystal-field energy-level scheme and wave functions. Synchrotron XRD data confirm the ordered cubic pyrochlore (Fd3m) structure without any noticeable site mixing or oxygen deficiency. No clear evidence of long-range magnetic ordering is observed down to 90 mK, however the χac(T) evinces slow spin dynamics revealed by a frequency dependent broad peak associated with spin freezing. The INS data reveal the expected five well-defined magnetic excitations due to crystal-field splitting of the J=4 ground-state multiplet of the Pr ³⁺ . The crystal-field parameters and ground-state wave function of Pr ³⁺ have been determined. The Ising anisotropic nature of the magnetic ground state is inferred from the INS as well as χ(T) and M(H) data. Together these properties make Pr ₂ Hf ₂ O ₇ a candidate compound for quantum spin-ice behavior.

Original language	English
Article number	144415
Journal	Physical Review B
Volume	94
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.94.144415
Publication status	Published - 13 Oct 2016

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Anand, V. K., Opherden, L., Xu, J., Adroja, D. T., Islam, A. T. M. N., Herrmannsdörfer, T., Hornung, J., Schönemann, R., Uhlarz, M., Walker, H. C., Casati, N., & Lake, B. (2016). Physical properties of the candidate quantum spin-ice system Pr2Hf2 O ₇ Physical Review B, 94(14), Article 144415. https://doi.org/10.1103/PhysRevB.94.144415

@article{357072c5749247e2807bda061744aa06,

title = " Physical properties of the candidate quantum spin-ice system Pr2Hf2 O 7 ",

abstract = " Physical properties of a pyrohafnate compound Pr2Hf2O7 have been investigated by ac magnetic susceptibility χac(T), dc magnetic susceptibility χ(T), isothermal magnetization M(H), and heat-capacity Cp(T) measurements on polycrystalline as well as single-crystal samples combined with high-resolution synchrotron x-ray diffraction (XRD) for structural characterization and inelastic neutron scattering (INS) to determine the crystal-field energy-level scheme and wave functions. Synchrotron XRD data confirm the ordered cubic pyrochlore (Fd3m) structure without any noticeable site mixing or oxygen deficiency. No clear evidence of long-range magnetic ordering is observed down to 90 mK, however the χac(T) evinces slow spin dynamics revealed by a frequency dependent broad peak associated with spin freezing. The INS data reveal the expected five well-defined magnetic excitations due to crystal-field splitting of the J=4 ground-state multiplet of the Pr 3+ . The crystal-field parameters and ground-state wave function of Pr 3+ have been determined. The Ising anisotropic nature of the magnetic ground state is inferred from the INS as well as χ(T) and M(H) data. Together these properties make Pr 2 Hf 2 O 7 a candidate compound for quantum spin-ice behavior.",

author = "Anand, {V. K.} and L. Opherden and J. Xu and Adroja, {D. T.} and Islam, {A. T.M.N.} and T. Herrmannsd{\"o}rfer and J. Hornung and R. Sch{\"o}nemann and M. Uhlarz and Walker, {H. C.} and N. Casati and B. Lake",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

month = oct,

day = "13",

doi = "10.1103/PhysRevB.94.144415",

language = "English",

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Anand, VK, Opherden, L, Xu, J, Adroja, DT, Islam, ATMN, Herrmannsdörfer, T, Hornung, J, Schönemann, R, Uhlarz, M, Walker, HC, Casati, N & Lake, B 2016, ' Physical properties of the candidate quantum spin-ice system Pr2Hf2 O ₇ ', Physical Review B, vol. 94, no. 14, 144415. https://doi.org/10.1103/PhysRevB.94.144415

TY - JOUR

T1 - Physical properties of the candidate quantum spin-ice system Pr2Hf2 O 7

AU - Anand, V. K.

AU - Opherden, L.

AU - Xu, J.

AU - Adroja, D. T.

AU - Islam, A. T.M.N.

AU - Herrmannsdörfer, T.

AU - Hornung, J.

AU - Schönemann, R.

AU - Uhlarz, M.

AU - Walker, H. C.

AU - Casati, N.

AU - Lake, B.

PY - 2016/10/13

Y1 - 2016/10/13

N2 - Physical properties of a pyrohafnate compound Pr2Hf2O7 have been investigated by ac magnetic susceptibility χac(T), dc magnetic susceptibility χ(T), isothermal magnetization M(H), and heat-capacity Cp(T) measurements on polycrystalline as well as single-crystal samples combined with high-resolution synchrotron x-ray diffraction (XRD) for structural characterization and inelastic neutron scattering (INS) to determine the crystal-field energy-level scheme and wave functions. Synchrotron XRD data confirm the ordered cubic pyrochlore (Fd3m) structure without any noticeable site mixing or oxygen deficiency. No clear evidence of long-range magnetic ordering is observed down to 90 mK, however the χac(T) evinces slow spin dynamics revealed by a frequency dependent broad peak associated with spin freezing. The INS data reveal the expected five well-defined magnetic excitations due to crystal-field splitting of the J=4 ground-state multiplet of the Pr 3+ . The crystal-field parameters and ground-state wave function of Pr 3+ have been determined. The Ising anisotropic nature of the magnetic ground state is inferred from the INS as well as χ(T) and M(H) data. Together these properties make Pr 2 Hf 2 O 7 a candidate compound for quantum spin-ice behavior.

AB - Physical properties of a pyrohafnate compound Pr2Hf2O7 have been investigated by ac magnetic susceptibility χac(T), dc magnetic susceptibility χ(T), isothermal magnetization M(H), and heat-capacity Cp(T) measurements on polycrystalline as well as single-crystal samples combined with high-resolution synchrotron x-ray diffraction (XRD) for structural characterization and inelastic neutron scattering (INS) to determine the crystal-field energy-level scheme and wave functions. Synchrotron XRD data confirm the ordered cubic pyrochlore (Fd3m) structure without any noticeable site mixing or oxygen deficiency. No clear evidence of long-range magnetic ordering is observed down to 90 mK, however the χac(T) evinces slow spin dynamics revealed by a frequency dependent broad peak associated with spin freezing. The INS data reveal the expected five well-defined magnetic excitations due to crystal-field splitting of the J=4 ground-state multiplet of the Pr 3+ . The crystal-field parameters and ground-state wave function of Pr 3+ have been determined. The Ising anisotropic nature of the magnetic ground state is inferred from the INS as well as χ(T) and M(H) data. Together these properties make Pr 2 Hf 2 O 7 a candidate compound for quantum spin-ice behavior.

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DO - 10.1103/PhysRevB.94.144415

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VL - 94

JO - Physical Review B

JF - Physical Review B

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Physical properties of the candidate quantum spin-ice system Pr2Hf2 O ₇

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