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A crystallographic phase transition within the magnetically ordered state of Ce_2Fe_17
A. Kreyssig, S. Chang, Y. Janssen +7
X-ray diffraction experiments were performed on polycrystalline and single-crystal specimens of CeFe at temperatures between 10 K and 300 K. Below = 1…
Magnetic phase diagram of Ce2Fe17
Y. Janssen, S. Chang, A. Kreyssig +4
Rare-earth-based permanent-magnet materials rich in iron have relatively low ferromagnetic ordering temperatures. This is believed to be due to the presence of antiferromagnetic ex…
Magnetic field tuning of the low temperature state in YbNiSi3
Sergey L. Bud'ko, Paul C. Canfield, Marcos A. Avila +1
We present detailed, low temperature, magnetoresistance and specific heat data of single crystal YbNiSi3 measured in magnetic field applied along the easy magnetic axis, H || b. An…
Separation of energy scales in the kagome antiferromagnet TmAgGe: a magnetic-field-orientation study up to 55 T
P. A. Goddard, J. Singleton, A. L. Lima-Sharma +4
TmAgGe is an antiferromagnet in which the spins are confined to distorted kagome-like planes at low temperatures. We report angle-dependent measurements of the magnetization in…
A versatile and compact capacitive dilatometer
G. M. Schmiedeshoff, A. W. Lounsbury, D. J. Luna +13
We describe the design, construction, calibration, and operation of a relatively simple differential capacitive dilatometer suitable for measurements of thermal expansion and magne…
YSix closely related YbTZn (T = Fe, Co, Ru, Rh, Os, Ir) heavy fermion compounds with large local moment degeneracy
M. S. Torikachvili, S. Jia, E. D. Mun +6
Heavy fermion compounds represent one of the most strongly correlated forms of electronic matter and give rise to low temperature states that range from small moment ordering to ex…
Anisotropic thermal expansion and uniaxial pressure dependence of superconducting and magnetic transitions in ErNi2B2C
S. L. Bud'ko, G. M. Schmiedeshoff, P. C. Canfield
We present anisotropic thermal expansion measurements on single crystalline ErNi2B2C. All three, superconducting, antiferromagnetic and weak ferromagnetic phase transitions are una…
Magnetic field induced orientation of superconducting MgB crystallites determined by X-ray diffraction
J. Li, D. Vaknin, S. L. Bud'ko +5
X-ray diffraction studies of fine polycrystalline samples of MgB in the superconducting state reveal that crystals orient with their \emph{c}-axis in a plane normal to the dire…
Anisotropic thermal expansion and magnetostriction of YNiBC single crystals
S. L. Bud'ko, G. M. Schmiedeshoff, G. Lapertot +1
We present results of anisotropic thermal expansion and low temperature magnetostriction measurements on YNiBC single crystals grown by high temperature flux and floating z…
Effect of field dependent core size on reversible magnetization of high- superconductors
V. G. Kogan, R. Prozorov, S. L. Bud'ko +5
The field dependence of the vortex core size is incorporated in the London model, in order to describe reversible magnetization for a number of materials with large…
High temperature ferromagnetism in GdFe2Zn20: large, local moments embedded in the nearly ferromagnetic Fermi liquid compound YFe2Zn20
S. Jia, S. L. Bud'ko, G. D. Samolyuk +1
The RFeZn series manifests strongly correlated electron behavior for the non-magnetic R = Y member and remarkably high temperature, ferromagnetic ordering ( = 86 K)…
Contact-less measurements of Shubnikov-de Haas oscillations in the magnetically ordered state of CeAgSb and SmAgSb single crystals
Ruslan Prozorov, Matthew D. Vannette, German D. Samolyuk +3
Shubnikov - de Haas oscillations were measured in single crystals of highly metallic antiferromagnetic SmAgSb and ferromagnetic CeAgSb using a tunnel diode resonator. R…
Point-contact spectroscopy of Al- and C-doped MgB2. Superconducting energy gaps and scattering studies
P. Szabo, P. Samuely, Z. Hol'anova +3
The two-band/two-gap superconductivity in aluminium and carbon doped MgB has been addressed by the point-contact spectroscopy. Two gaps are preserved in all samples with $T_c's…