Abstract
The non-centrosymmetric heavy fermion compound CePt3Si orders
antiferromag-netically at TN = 2.2K, followed by a
superconducting transition, where Ts = 0.45 K for high
quality samples and Ts = 0.75K for lower quality samples. We
have used neutron Larmor diffraction to measure the temperature
dependence and distribution of the lattice constants in a single crystal
of CePt3Si with Ts = 0.75K. In our study we
observe an unusually wide range of lattice parameters for the a-axis and
c-axis with Δa/a approx Δc/c approx 10‑3.
Small angle neutron scattering suggests an abundance of defects along
the lattice planes. When taking into account the pressure dependence of
Ts our study attributes the increased value of Ts
in low quality samples to an effective negative pressure.
Original language | English |
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Pages (from-to) | 012165- |
Journal | Journal of Physics: Conference Series |
Volume | 200 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Jan 2010 |