Unusual signatures of the ferromagnetic transition in the heavy fermion compound UMn2Al20

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

Unusual signatures of the ferromagnetic transition in the heavy fermion compound UMn₂Al₂₀

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

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

Magnetic-susceptibility results for single crystals of the new cubic compounds U T_2Al20(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 UMn₂Al₂₀. For T=V and Mo, temperature-independent Pauli paramagnetism is observed. For UMn₂Al₂₀, 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 UMn₂Al₂₀: moderately small moment itinerant ferromagnetism or induced local-moment ferromagnetism.

Original language	English
Article number	094406
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	82
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.82.094406
State	Published - Sep 2 2010
Externally published	Yes

Access to Document

10.1103/PhysRevB.82.094406

Cite this

@article{3243362c81f54b72aad7adefaa6235e3,

title = "Unusual signatures of the ferromagnetic transition in the heavy fermion compound UMn2Al20",

abstract = "Magnetic-susceptibility results for single crystals of the new cubic compounds U T2Al20(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 UMn2Al20. For T=V and Mo, temperature-independent Pauli paramagnetism is observed. For UMn2Al20, a ferromagnetic transition is observed in the magnetic susceptibility at T c =20 K. The specific-heat anomaly at Tc is very weak while no anomaly in the resistivity is seen at Tc. We discuss two possible origins for this behavior of UMn2Al20: moderately small moment itinerant ferromagnetism or induced local-moment ferromagnetism.",

author = "Wang, \{C. H.\} and Lawrence, \{J. M.\} and Bauer, \{E. D.\} and K. Kothapalli and Gardner, \{J. S.\} and F. Ronning and K. Gofryk and Thompson, \{J. D.\} and H. Nakotte and F. Trouw",

year = "2010",

month = sep,

day = "2",

doi = "10.1103/PhysRevB.82.094406",

language = "English",

volume = "82",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "1098-0121",

publisher = "American Physical Society",

number = "9",

}

TY - JOUR

T1 - Unusual signatures of the ferromagnetic transition in the heavy fermion compound UMn2Al20

AU - Wang, C. H.

AU - Lawrence, J. M.

AU - Bauer, E. D.

AU - Kothapalli, K.

AU - Gardner, J. S.

AU - Ronning, F.

AU - Gofryk, K.

AU - Thompson, J. D.

AU - Nakotte, H.

AU - Trouw, F.

PY - 2010/9/2

Y1 - 2010/9/2

N2 - Magnetic-susceptibility results for single crystals of the new cubic compounds U T2Al20(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 UMn2Al20. For T=V and Mo, temperature-independent Pauli paramagnetism is observed. For UMn2Al20, a ferromagnetic transition is observed in the magnetic susceptibility at T c =20 K. The specific-heat anomaly at Tc is very weak while no anomaly in the resistivity is seen at Tc. We discuss two possible origins for this behavior of UMn2Al20: moderately small moment itinerant ferromagnetism or induced local-moment ferromagnetism.

AB - Magnetic-susceptibility results for single crystals of the new cubic compounds U T2Al20(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 UMn2Al20. For T=V and Mo, temperature-independent Pauli paramagnetism is observed. For UMn2Al20, a ferromagnetic transition is observed in the magnetic susceptibility at T c =20 K. The specific-heat anomaly at Tc is very weak while no anomaly in the resistivity is seen at Tc. We discuss two possible origins for this behavior of UMn2Al20: moderately small moment itinerant ferromagnetism or induced local-moment ferromagnetism.

UR - https://www.scopus.com/pages/publications/77957559406

U2 - 10.1103/PhysRevB.82.094406

DO - 10.1103/PhysRevB.82.094406

M3 - Article

AN - SCOPUS:77957559406

SN - 1098-0121

VL - 82

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 9

M1 - 094406

ER -

Unusual signatures of the ferromagnetic transition in the heavy fermion compound UMn₂Al₂₀

Abstract

Access to Document

Other files and links

Fingerprint

Cite this