Emergent magnetic behavior in the frustrated Yb3Ga5O12 garnet
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Emergent magnetic behavior in the frustrated Yb3Ga5O12 garnet. / Sandberg, Lise Orduk; Edberg, Richard; Bakke, Ingrid-Marie Berg; Pedersen, Kasper S.; Hatnean, Monica Ciomaga; Balakrishnan, Geetha; Mangin-Thro, Lucile; Wildes, Andrew; Fak, B.; Ehlers, Georg; Sala, Gabriele; Henelius, Patrik; Lefmann, Kim; Deen, Pascale P.
In: Physical Review B, Vol. 104, No. 6, 064425, 13.08.2021.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Emergent magnetic behavior in the frustrated Yb3Ga5O12 garnet
AU - Sandberg, Lise Orduk
AU - Edberg, Richard
AU - Bakke, Ingrid-Marie Berg
AU - Pedersen, Kasper S.
AU - Hatnean, Monica Ciomaga
AU - Balakrishnan, Geetha
AU - Mangin-Thro, Lucile
AU - Wildes, Andrew
AU - Fak, B.
AU - Ehlers, Georg
AU - Sala, Gabriele
AU - Henelius, Patrik
AU - Lefmann, Kim
AU - Deen, Pascale P.
PY - 2021/8/13
Y1 - 2021/8/13
N2 - We report neutron scattering, magnetic susceptibility and Monte Carlo theoretical analysis to verify the short-range nature of the magnetic structure and spin-spin correlations in a Yb3Ga5O12 single crystal. The quantum spin state of Yb3+ in Yb3Ga5O12 is verified. The quantum spins organize into a short-ranged emergent director state for T < 0.6 K derived from anisotropy and near-neighbor exchange. We derive the magnitude of the nearneighbor exchange interactions 0.6 < J(1) < 0.7 K, J(2) = 0.12 K and the magnitude of the dipolar exchange interaction, D, in the range 0.18 < D < 0.21 K. Certain aspects of the broad experimental dataset can be modeled using a J(1)D model with ferromagnetic near-neighbor spin-spin correlations while other aspects of the data can be accurately reproduced using a J(1)J(2)D model with antiferromagnetic near-neighbor spin-spin correlation. As such, although we do not quantify all the relevant exchange interactions, we nevertheless provide a strong basis for the understanding of the complex Hamiltonian required to fully describe the magnetic state of Yb3Ga5O12.
AB - We report neutron scattering, magnetic susceptibility and Monte Carlo theoretical analysis to verify the short-range nature of the magnetic structure and spin-spin correlations in a Yb3Ga5O12 single crystal. The quantum spin state of Yb3+ in Yb3Ga5O12 is verified. The quantum spins organize into a short-ranged emergent director state for T < 0.6 K derived from anisotropy and near-neighbor exchange. We derive the magnitude of the nearneighbor exchange interactions 0.6 < J(1) < 0.7 K, J(2) = 0.12 K and the magnitude of the dipolar exchange interaction, D, in the range 0.18 < D < 0.21 K. Certain aspects of the broad experimental dataset can be modeled using a J(1)D model with ferromagnetic near-neighbor spin-spin correlations while other aspects of the data can be accurately reproduced using a J(1)J(2)D model with antiferromagnetic near-neighbor spin-spin correlation. As such, although we do not quantify all the relevant exchange interactions, we nevertheless provide a strong basis for the understanding of the complex Hamiltonian required to fully describe the magnetic state of Yb3Ga5O12.
KW - SPIN ICE
KW - ALUMINUM GARNETS
KW - ENERGY-LEVELS
KW - GALLIUM
KW - SPECTROMETER
KW - YB3+
U2 - 10.1103/PhysRevB.104.064425
DO - 10.1103/PhysRevB.104.064425
M3 - Journal article
VL - 104
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 6
M1 - 064425
ER -
ID: 276376084