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Search for pressure induced superconductivity in CeFeAsO and CeFePO iron pnictides
Diego A. Zocco, Ryan E. Baumbach, James J. Hamlin +11
The CeFeAsO and CeFePO iron pnictide compounds were studied via electrical transport measurements under high-pressure. In CeFeAsO polycrystals, the magnetic phases involving the Fe…
Thermal and magnetic properties of a low-temperature antiferromagnet CePtSn
Nobuyuki Kurita, Han-Oh Lee, Yoshi Tokiwa +10
We report specific heat () and magnetization () of single crystalline CePtSn at temperature down to 50mK and in fields up to 3T. exhibits a shar…
Magnetic-Field-Independent Ultrasonic Dispersions in the Magnetically Robust Heavy Fermion System SmOs4Sb12
Tatsuya Yanagisawa, Hitoshi Saito, Hiroyuki Hidaka +8
Elastic properties of the filled skutterudite compound SmOsSb have been investigated by ultrasonic measurements. The elastic constant shows two ultrasonic di…
Superconductivity, magnetic order, and quadrupolar order in the filled skutterudite system PrNdOsSb
P. -C. Ho, T. Yanagisawa, W. M. Yuhasz +5
Superconductivity, magnetic order, and quadrupolar order have been investigated in the filled skutterudite system PrNdOsSb as a function of composition …
The degree of 5f electron localization in URu2Si2: electron energy-loss spectroscopy and spin-orbit sum rule analysis
J. R. Jeffries, K. T. Moore, N. P. Butch +1
We examine the degree of 5f electron localization in URu2Si2 using spin-orbit sum rule analysis of the U N4,5 (4d \to 5f) edge. When compared to α-U metal, US, USe, and UTe, which…
Antiferromagnetic critical pressure in URu2Si2 under hydrostatic conditions
Nicholas P. Butch, Jason R. Jeffries, Songxue Chi +3
The onset of antiferromagnetic order in URu2Si2 has been studied via neutron diffraction in a helium pressure medium, which most closely approximates hydrostatic conditions. The an…
Limits on Superconductivity-Related Magnetization in SrRuO and PrOsSb from Scanning SQUID Microscopy
Clifford W. Hicks, John R. Kirtley, Thomas M. Lippman +6
We present scanning SQUID microscopy data on the superconductors Sr2RuO4 (Tc = 1.5 K) and PrOsSb (Tc = 1.8 K). In both of these materials, superconductivity-related time…
Signatures of pressure induced superconductivity in insulating Bi2212
T. Cuk, D. A. Zocco, H. Eisaki +4
We have performed several high pressure electrical resistance experiments on Bi1.98Sr2.06Y0.68Cu2O8, an insulating parent compound of the high-Tc Bi2212 family of copper oxide supe…
The crystalline lattice of URu_2Si_2 under pressure in the paramagnetic, hidden order, and antiferromagnetic states
J. R. Jeffries, N. P. Butch, J. J. Hamlin +3
X-ray diffraction experiments under pressure in a diamond anvil cell have been performed to gauge any response of the crystalline lattice of URu2Si2 to the "hidden order" or antife…
Response to I. I. Mazin's correspondence on "Electronic correlations in the iron pnictides"
M. M. Qazilbash, J. J. Hamlin, R. E. Baumbach +4
We discuss the discrepancy between the measured optical Drude weight and band structure calculations in LaFePO and other iron-based superconductors. This discrepancy is mostly due…