Antiferromagnetic ordering in NdAuGe compound

Journal Article · Wed May 07 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4869439· OSTI ID:22273713

Bashir, A. K. H.; Snyman, J. L.; Sondezi, B. M.; Strydom, A. M. ^[1]

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1. Department of Physics, University of Johannesburg, Auckland Park 2006 (South Africa)

The compound NdAuGe was investigated by means of electrical resistivity, ρ(T), magnetic susceptibility, χ(T), magnetization, σ(μ{sub 0}H), and specific heat, C{sub p}(T), measurements. Powder X-ray diffraction studies confirm a hexagonal LiGaGe-type structure with space group P6{sub 3}mc (No. 186). ρ(T) data show normal metallic behaviour and a tendency toward saturation at higher temperatures. The low temperature ρ(T) data indicate a phase transition around 3.8 K. The low field dc χ(T) data show an antiferromagnetic anomaly associated with a Néel temperature at T{sub N} = 3.7 K close to the phase transition observed in ρ(T) results. At higher temperatures, χ(T) follows the paramagnetic Curie-Weiss behaviour with an effective magnetic moment μ{sub eff}=3.546(4) μ{sub B} and a paramagnetic Weiss temperature of θ{sub p}=−6.1(4) K. The value obtained for μ{sub eff} is close to the value of 3.62 μ{sub B} expected for the free Nd{sup 3+}-ion. σ(μ{sub 0}H) shows a linear behaviour with applied field up to 3 T with an evidence of metamagnetic behaviour above 3 T. C{sub p}(T) confirms the magnetic phase transition at T{sub N} = 3.4 K. The 4f-electron specific heat indicates a Schottky-type anomaly around 16.5 K with energy splitting Δ{sub 1}=25.8(4) K and Δ{sub 2}=50.7(4) K of the Nd{sup 3+} (J = 9/2) multiplet, that are associated with, respectively, the first and second excited states of the Nd{sup 3+}-ion.

• OSTI ID: 22273713
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
ELECTRIC CONDUCTIVITY
ELECTRONS
EXCITED STATES
GERMANIUM
GOLD
HEXAGONAL LATTICES
INTERMETALLIC COMPOUNDS
MAGNETIC MOMENTS
MAGNETIC SUSCEPTIBILITY
MAGNETIZATION
NEODYMIUM
NEODYMIUM IONS
PARAMAGNETISM
PHASE TRANSFORMATIONS
POWDERS
SPECIFIC HEAT
TEMPERATURE DEPENDENCE
X-RAY DIFFRACTION