Effect of magnetic field on antiferromagnetism in non-centrosymmetric heavy-fermion superconductor CePtSi

Kaneko, Koji ; Stockert, O.*; Arndt, J.*; Borth, R.*; Skoulatos, M.*; Habicht, K.*; Kiefer, K.*; Schneidewind, A.*; Etzdorf, D.*; Takeuchi, Tetsuya*; Matsuda, Tatsuma; Haga, Yoshinori ; Settai, Rikio*; Onuki, Yoshichika*; Metoki, Naoto

The heavy-fermion superconductivity in CePtSi with a non-centrosymmetric structure attracts a lot of attention since novel superconducting properties are expected under this symmetry. Another characteristics of the superconductivity in CePtSi is its coexistence with long-range antiferromagnetic order. Therefore detailed antiferromagnetic properties and its interplay with superconductivity are of strong interest to investigate. The magnetic structure of CePtSi is represented by =(0,0,1/2). We have observed that the 0 0 1/2 antiferromagnetic reflection exhibits a peculiar response to an external magnetic field; its intensity increases with magnetic fields. These results imply unusual antiferromagnetism in CePtSi.

Language	:	English
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Meeting title	:	International Conference on Quantum Criticality and Novel Phases (QCNP 2009)
Held date	:	2009/08
Location (city)	:	Dresden
Location (country)	:	Germany
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Keywords	:	no keyword
Research Facility	:	JRR-3M(研究炉3)
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Registration No. : BB20090708
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