Antiferromagnetic order in the pyrochlores R2 Ge2 O7 (R= Er, Yb) ANTIFERROMAGNETIC ORDER in the PYROCHLORES ... Z. L. DUN et al.

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

doi:10.1103/PhysRevB.92.140407

Antiferromagnetic order in the pyrochlores R2 Ge2 O7 (R= Er, Yb) ANTIFERROMAGNETIC ORDER in the PYROCHLORES ... Z. L. DUN et al.

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

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Abstract

Elastic neutron scattering, ac susceptibility, and specific heat experiments on the pyrochlores Er2Ge2O7 and Yb2Ge2O7 show that both systems are antiferromagnetically ordered in the Γ5 manifold. The ground state is a ψ3 phase for the Er sample and a ψ2 or ψ3 phase for the Yb sample, which suggests "Order by Disorder" physics. Furthermore, we unify the various magnetic ground states of all known R2X2O7 (R=Er, Yb; X=Sn, Ti, Ge) compounds through the enlarged XY-type exchange interaction J± under chemical pressure. The mechanism for this evolution is discussed in terms of the phase diagram proposed in the theoretical study by Wong et al. [Phys. Rev. B 88, 144402 (2013)PRBMDO1098-012110.1103/PhysRevB.88.144402].

Original language	English
Article number	140407
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	92
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.92.140407
State	Published - Oct 7 2015

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Dun, Z. L., Li, X., Freitas, R. S., Arrighi, E., Dela Cruz, C. R., Lee, M., Choi, E. S., Cao, H. B., Silverstein, H. J., Wiebe, C. R., Cheng, J. G., & Zhou, H. D. (2015). Antiferromagnetic order in the pyrochlores R2 Ge2 O7 (R= Er, Yb) ANTIFERROMAGNETIC ORDER in the PYROCHLORES ... Z. L. DUN et al. Physical Review B - Condensed Matter and Materials Physics, 92(14), Article 140407. https://doi.org/10.1103/PhysRevB.92.140407

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title = "Antiferromagnetic order in the pyrochlores R2 Ge2 O7 (R= Er, Yb) ANTIFERROMAGNETIC ORDER in the PYROCHLORES ... Z. L. DUN et al.",

abstract = "Elastic neutron scattering, ac susceptibility, and specific heat experiments on the pyrochlores Er2Ge2O7 and Yb2Ge2O7 show that both systems are antiferromagnetically ordered in the Γ5 manifold. The ground state is a ψ3 phase for the Er sample and a ψ2 or ψ3 phase for the Yb sample, which suggests {"}Order by Disorder{"} physics. Furthermore, we unify the various magnetic ground states of all known R2X2O7 (R=Er, Yb; X=Sn, Ti, Ge) compounds through the enlarged XY-type exchange interaction J± under chemical pressure. The mechanism for this evolution is discussed in terms of the phase diagram proposed in the theoretical study by Wong et al. [Phys. Rev. B 88, 144402 (2013)PRBMDO1098-012110.1103/PhysRevB.88.144402].",

author = "Dun, {Z. L.} and X. Li and Freitas, {R. S.} and E. Arrighi and {Dela Cruz}, {C. R.} and M. Lee and Choi, {E. S.} and Cao, {H. B.} and Silverstein, {H. J.} and Wiebe, {C. R.} and Cheng, {J. G.} and Zhou, {H. D.}",

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doi = "10.1103/PhysRevB.92.140407",

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Dun, ZL, Li, X, Freitas, RS, Arrighi, E, Dela Cruz, CR, Lee, M, Choi, ES, Cao, HB, Silverstein, HJ, Wiebe, CR, Cheng, JG & Zhou, HD 2015, 'Antiferromagnetic order in the pyrochlores R2 Ge2 O7 (R= Er, Yb) ANTIFERROMAGNETIC ORDER in the PYROCHLORES ... Z. L. DUN et al.', Physical Review B - Condensed Matter and Materials Physics, vol. 92, no. 14, 140407. https://doi.org/10.1103/PhysRevB.92.140407

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AU - Dun, Z. L.

AU - Li, X.

AU - Freitas, R. S.

AU - Arrighi, E.

AU - Dela Cruz, C. R.

AU - Lee, M.

AU - Choi, E. S.

AU - Cao, H. B.

AU - Silverstein, H. J.

AU - Wiebe, C. R.

AU - Cheng, J. G.

AU - Zhou, H. D.

PY - 2015/10/7

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N2 - Elastic neutron scattering, ac susceptibility, and specific heat experiments on the pyrochlores Er2Ge2O7 and Yb2Ge2O7 show that both systems are antiferromagnetically ordered in the Γ5 manifold. The ground state is a ψ3 phase for the Er sample and a ψ2 or ψ3 phase for the Yb sample, which suggests "Order by Disorder" physics. Furthermore, we unify the various magnetic ground states of all known R2X2O7 (R=Er, Yb; X=Sn, Ti, Ge) compounds through the enlarged XY-type exchange interaction J± under chemical pressure. The mechanism for this evolution is discussed in terms of the phase diagram proposed in the theoretical study by Wong et al. [Phys. Rev. B 88, 144402 (2013)PRBMDO1098-012110.1103/PhysRevB.88.144402].

AB - Elastic neutron scattering, ac susceptibility, and specific heat experiments on the pyrochlores Er2Ge2O7 and Yb2Ge2O7 show that both systems are antiferromagnetically ordered in the Γ5 manifold. The ground state is a ψ3 phase for the Er sample and a ψ2 or ψ3 phase for the Yb sample, which suggests "Order by Disorder" physics. Furthermore, we unify the various magnetic ground states of all known R2X2O7 (R=Er, Yb; X=Sn, Ti, Ge) compounds through the enlarged XY-type exchange interaction J± under chemical pressure. The mechanism for this evolution is discussed in terms of the phase diagram proposed in the theoretical study by Wong et al. [Phys. Rev. B 88, 144402 (2013)PRBMDO1098-012110.1103/PhysRevB.88.144402].

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Antiferromagnetic order in the pyrochlores R2 Ge2 O7 (R= Er, Yb) ANTIFERROMAGNETIC ORDER in the PYROCHLORES ... Z. L. DUN et al.

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