transition in CoS2 at high pressures F.S. Elkin, 1 I.P. Zibrov, 1 - - PowerPoint PPT Presentation
Thermodynamics of the ferromagnetic phase transition in CoS2 at high pressures F.S. Elkin, 1 I.P. Zibrov, 1 A.P. Novikov, 1 S.S. Khasanov, 2 .A.Sidorov, 1 A.E. Petrova, 1 T.A. Lograsso, 3 J.D. Thompson, 4 and S.M. Stishov 1 1 Institute for High
F.S. Elkin,1 I.P. Zibrov,1 A.P. Novikov,1 S.S. Khasanov,2 .A.Sidorov,1 A.E. Petrova,1 T.A. Lograsso,3 J.D. Thompson,4 and S.M. Stishov1
1Institute for High Pressure Physics of Russian Academy of Sciences, Troitsk, Russia 2Institute for Solid State Physics, Russian Academy of Sciences,
Chernogolovka, Moscow Region, Russia
3Ames Laboratory, Iowa State University, Ames, IA 50011, USA 4Los Alamos National Laboratory, Los Alamos, NM 87545, USA
1 2 3 4 5 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 20 40 60 80 100 120
50 100 150 20 40 60 80 100
/(Tc)
Pressure (GPa) Transition temperature Tc(K)
prospected measurements
( cm)
Temperature (K) PHYSICAL REVIEW B 83, 060412(R) (2011) High-pressure study of the phase transition in the itinerant ferromagnet CoS2
Pa-3 (205) - cubic a=5.5385 Å V=169.89 Å3
Beamline 16-BM-D: Sector 16 - Bending Magnet Beamline HP-CAT Materials Science, GeoScience, Chemistry, Physics
Description This beamline supports high-pressure angle dispersive x-ray diffraction and absorption spectroscopy with microfocus beams. Supported Techniques Powder angular dispersive x-ray diffraction X-ray absorption near-edge structure Single-crystal diffraction High-pressure diamond anvil cell Beamline Controls and Data Acquisition Windows XP and Linux workstations; EPICS based applications
Display and control: MEDM, Java, and IDL based software. Detectors MAR 345 Ge solid state detectors Additional Equipment Cryostats Membrane Control system On-line Ruby system On-line Raman system
Source Bending Magnet Monochromator Type Si(111) Energy Range 6-70 keV Resolution (ΔE/E) 1 x 10 -4 Flux (photons/sec) 5 x 10 8 @30 keV Beam Size (HxV) Focused 5µm x 10µm Unfocused 0.5mm x 0.5mm
Beamline 16-BM-D: Sector 16 - Bending Magnet Beamline HP-CAT
Beamline 16-BM-D: Sector 16 - Bending Magnet Beamline HP-CAT
Beamline 16-BM-D: Sector 16 - Bending Magnet Beamline HP-CAT
Beamline 16-BM-D: Sector 16 - Bending Magnet Beamline HP-CAT
Beamline 16-BM-D: Sector 16 - Bending Magnet Beamline HP-CAT
Curve 1 was determined making use a ”lead” manometer to measure pressure12. Curve 2 was determined by X-ray diffraction and the pressure measured by a ruby sensor.
50 100 150 200 250 300 1 2 3 4 5 6 7
1.22 GPa TC CoS2 TG GW60/40 C/T (J/K
2)
T(K)
Entropy of the phase transition in CoS2