Stabilization of commensurate antiferromagnetism in CePt2In7 by pressure up to 2.4 GPa: In-115 NMR and NQR under zero field

作者：Sakai H^*; Tokunaga Y; Kambe S; Lee H O; Sidorov V A; Tobash P H; Ronning F; Bauer E D; Thompson J D

来源：Physical Review B, 2011, 83(14): 140408.

DOI：10.1103/PhysRevB.83.140408

Zero-field In-115-nuclear magnetic resonance (NMR) has been used to study single crystals of CePt2In7, a heavy-fermion antiferromagnet with a Neel temperature (T-N) of 5.2 K at ambient pressure. Narrow linewidths of In-115-nuclear quadrupolar resonance spectra are observed from each of three crystallographically inequivalent In(1), In(2), and In(3) sites. The NMR spectra under zero field near the 3 nu(Q) line of the orthorhombic In(3) sites are tracked by temperatures down to 1.6 K and by hydrostatic pressures up to 2.4 GPa. These data reveal the coexistence of commensurate and incommensurate antiferromagneic orders at ambient pressure and that the commensurate ordering is stabilized by increasing pressures where bulk superconductivity emerges.

• 出版日期2011-4-19