23 research outputs found
Magnetocaloric effect in the high-temperature antiferromagnet YbCoC2
The magnetic - phase diagram and magnetocaloric effect in the recently
discovered high-temperature heavy-fermion compound YbCoC have been studied.
With the increase in the external magnetic field YbCoC experiences the
metamagnetic transition and then transition to the ferromagnetic state. The
dependencies of magnetic entropy change - have segments with
positive and negative magnetocaloric effects for ~T. For
~T magnetocaloric effect becomes positive with a maximum value of
- is 4.1 J / kg K and a refrigerant capacity is 56.6 J / kg
Peculiar behavior of the electrical resistivity of MnSi at the ferromagnetic phase transition
The electrical resistivity of a single crystal of MnSi was measured across
its ferromagnetic phase transition line at ambient and high pressures. Sharp
peaks of the temperature coefficient of resistivity characterize the transition
line. Analysis of these data shows that at pressures to ~0.35 GPa these peaks
have fine structure, revealing a shoulder at ~ 0.5 K above the peak. It is
symptomatic that this structure disappears at pressures higher than ~0.35 GPa,
which was identified earlier as a tricritical poin
Elastic properties of FeSi
Measurements of the sound velocities in a single crystal of FeSi were
performed in the temperature range 4-300 K. Elastic constants and
deviate from a quasiharmonic behavior at high temperature; whereas,
increases anomalously in the entire range of temperature, indicating a
change in the electron structure of this materia