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Local structural variation as source of magnetic moment reduction in BaFe2As2
Jennifer L. Niedziela, M. A. McGuire, T. Egami
We report time-of-flight neutron powder diffraction results on stoichiometric BaFe2As2. Pair distribution function analysis shows that the orthorhombic distortion in the a-b plane…
Transport, Thermal, and Magnetic Properties of the Narrow-Gap Semiconductor CrSb2
Brian C. Sales, Andrew F. May, Michael A. McGuire +3
Resistivity, Hall effect, Seebeck coefficient, thermal conductivity, heat capacity, and magnetic susceptibility data are reported for CrSb2 single crystals. In spite of some unusua…
Structural and physical properties of layered oxy-arsenides LnRuAsO (Ln = La, Nd, Sm, Gd)
Michael A. McGuire, Andrew F. May, Brian C. Sales
Polycrystalline samples of LaRuAsO, NdRuAsO, SmRuAsO, and GdRuAsO have been synthesized and studied using powder x-ray diffraction, electrical transport, magnetization, and heat ca…
Physical properties of Ce3-xTe4 below room temperature
Andrew F. May, Michael A. McGuire, Claudia Cantoni +1
The physical properties of polycrystalline Ce3-xTe4 were investigated by measurements of the thermoelectric properties, Hall coefficient, heat capacity, and magnetization. The full…
Spin reorientation in TlFe1.6Se2 with complete vacancy ordering
Andrew F. May, Michael A. McGuire, Huibo Cao +5
The relationship between vacancy ordering and magnetism in TlFe1.6Se2 has been investigated via single crystal neutron diffraction, nuclear forward scattering, and transmission ele…
Neutron Diffraction Study of anomalous negative thermal expansion in non-superconducting PrFe1-xRuxAsO
Yuen Yiu, V. Ovidiu Garlea, Michael A. McGuire +3
Neutron powder diffraction has been used to investigate the structural and magnetic behavior of the isoelectronically doped Fe pnictide material PrFe1-xRuxAsO. Substitution of Ru f…
Itinerant electrons, local moments, and magnetic correlations in pnictides high temperature superconductors
P. Vilmercati, A. Fedorov, F. Bondino +11
A direct and element-specific measurement of the local Fe spin moment has been provided by analyzing the Fe 3s core level photoemission spectra in the parent and optimally doped Ce…
Evolution of the nuclear and magnetic structures of TlFe1.6Se2 with temperature
Huibo Cao, Claudia Cantoni, Andrew F. May +6
The evolution of the nuclear and magnetic structures of TlFeSe was determined in the temperature range of 5-450\,K using single crystal neutron diffraction. The Fe laye…
Properties of single crystalline AZn2Sb2 (A=Ca,Eu,Yb)
Andrew F. May, Michael A. McGuire, Jie Ma +3
Single crystals of CaZn2Sb2, EuZn2Sb2, and YbZn2Sb2 were grown from melts of nominal composition AZn5Sb5 (A=Ca,Eu,Yb) with the excess melt being removed at 1073\,K. The electrical…