Antiferromagnetism in Pr3In: Singlet/triplet physics with frustration

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dc.creatorChristianson, A. D.
dc.creatorLawrence, J. M.
dc.creatorZarestky, J. L.
dc.creatorSuzuki, H.
dc.creatorThompson, J. D.
dc.creatorHundley, M. F.
dc.creatorSarrao, J. L.
dc.creatorBooth, C. H.
dc.creatorAntonio, D.
dc.creatorCornelius, A. L.
dc.date2004-11-18
dc.date.accessioned2026-07-25T23:20:48Z
dc.descriptionWe present neutron diffraction, magnetic susceptibility and specific heat data for a single-crystal sample of the cubic (Cu3Au structure) compound Pr3In. This compound is believed to have a singlet (Gamma1) groundstate and a low-lying triplet (Gamma4) excited state. In addition, nearest-neighbor antiferromagnetic interactions are frustrated in this structure. Antiferromagnetic order occurs below T_N = 12K with propagation vector (0, 0, 0.5 +/-δ) where δ\approx 1/12. The neutron diffraction results can be approximated with the following model: ferromagnetic sheets from each of the three Pr sites alternate in sign along the propagation direction with a twelve-unit-cell square-wave modulation. The three moments of the unit cell of 1 μ_B magnitude are aligned so as to sum to zero as expected for nearest-neighbor antiferromagnetic interactions on a triangle. The magnetic susceptibility indicates that in addition to the antiferromagnetic transition at 12K, there is a transition near 70K below which there is a small (0.005 μ_B) ferromagnetic moment. There is considerable field and sample dependence to these transitions. The specific heat data show almost no anomaly at TN = 12K. This may be a consequence of the induced moment in the Gamma1 singlet, but may also be a sample-dependent effect.
dc.description22 pages including 7 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0411493
dc.identifierhttp://arxiv.org/abs/cond-mat/0411493
dc.identifier.urihttps://dspace.dare.co.zw/handle/123456789/97627
dc.subjectStrongly Correlated Electrons
dc.subjectMaterials Science
dc.titleAntiferromagnetism in Pr3In: Singlet/triplet physics with frustration
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