Unusual signatures of the ferromagnetic transition in the heavy Fermion compound UMn$_2$Al$_{20}$

C. H. Wang; J. M. Lawrence; E. D. Bauer; K. Kothapalli; J. S. Gardner; F. Ronning; K. Gofryk; J. D. Thompson; H. Nakotte; F. Trouw

doi:10.1103/PhysRevB.82.094406

paper

Unusual signatures of the ferromagnetic transition in the heavy Fermion compound UMn $_{2}$ Al $_{20}$

arXiv:1008.2235 · doi:10.1103/PhysRevB.82.094406

Abstract

Magnetic susceptibility results for single crystals of the new cubic compounds UT $_{2}$ Al $_{20}$ (T=Mn, V, and Mo) are reported. Magnetization, specific heat, resistivity, and neutron diffraction results for a single crystal and neutron diffraction and inelastic spectra for a powder sample are reported for UMn $_{2}$ Al $_{20}$ . For T = V and Mo, temperature independent Pauli paramagnetism is observed. For UMn $_{2}$ Al $_{20}$ , a ferromagnetic transition is observed in the magnetic susceptibility at $T_{c}$ = 20 K. The specific heat anomaly at $T_{c}$ is very weak while no anomaly in the resistivity is seen at $T_{c}$ . We discuss two possible origins for this behavior of UMn $_{2}$ Al $_{20}$ : moderately small moment itinerant ferromagnetism, or induced local moment ferromagnetism.

arXiv comment5 pages, 5 figures, to be published in Phys. rev. B

Unusual signatures of the ferromagnetic transition in the heavy Fermion compound UMn $_{2}$ Al $_{20}$

Abstract

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Unusual signatures of the ferromagnetic transition in the heavy Fermion compound UMn2​Al20​

Abstract

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Cited by in corpus (6)

Unusual signatures of the ferromagnetic transition in the heavy Fermion compound UMn $_{2}$ Al $_{20}$