Thursday, October 25, 2012

1210.6489 (Daniela Rauch et al.)

Magnetic phase diagram of CePt3B1-xSix    [PDF]

Daniela Rauch, Stefan Süllow, Matthias Bleckmann, Bastian Klemke, Klaus Kiefer, Moo Sung Kim, Meigan C. Aronson, Ernst Bauer
We present a study of the main bulk properties (susceptibility, magnetization, resistivity and specific heat) of CePt3B1-xSix, an alloying system that crystallizes in a noncentrosymmetric lattice, and derive the magnetic phase diagram. The materials at the end point of the alloying series have previously been studied, with CePt3B established as a material with two different magnetic phases at low temperatures (antiferromagnetic below TN = 7.8 K, weakly ferromagnetic below TC ~ 5 K), while CePt3Si is a heavy fermion superconductor (Tc = 0.75 K) coexisting with antiferromagnetism (TN = 2.2 K). From our experiments we conclude that the magnetic phase diagram is divided into two regions. In the region of low Si content (up to x ~ 0.7) the material properties resemble those of CePt3B. Upon increasing the Si concentration further the magnetic ground state continuously transforms into that of CePt3Si. In essence, we argue that CePt$_3$B can be understood as a low pressure variant of CePt3Si.
View original: http://arxiv.org/abs/1210.6489

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