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Journal Articles

NMR/NQR Study of pressure-induced superconductor CePt$$_2$$In$$_7$$

Sakai, Hironori; Tokunaga, Yo; Kambe, Shinsaku; Lee, H.*; Sidorov, V. A.*; Tobash, P. H.*; Ronning, F.*; Bauer, E. D.*; Thompson, J. D.*

Journal of Physics; Conference Series, 391, p.012057_1 - 012057_4, 2012/12

 Times Cited Count:4 Percentile:79.61

Zero-field $$^{115}$$In-nuclear magnetic resonance (NMR) has been used to study single crystals of CePt$$_2$$In$$_7$$, a heavy-fermion antiferromagnet with a N$'e$el temperature ($$T_{rm N}$$) of 5.2 K at ambient pressure. The NMR spectra under zero field near the 3$$nu_{rm Q}$$ 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 (C) and incommensurate (IC) antiferromagneic orders at ambient pressure and that the C-AFM ordering is stabilized by increasing pressures where bulk superconductivity emerges. We will show the recent data of spectra and nuclear relaxation rates ($$1/T_1$$) under pressures.

Journal Articles

Stabilization of commensurate antiferromagnetism in CePt$$_2$$In$$_7$$ by pressure up to 2.4 GPa; $$^{115}$$In NMR and NQR under zero field

Sakai, Hironori; Tokunaga, Yo; Kambe, Shinsaku; Lee, H.-O.*; Sidorov, V. A.*; Tobash, P. H.*; Ronning, F.*; Bauer, E. D.*; Thompson, J. D.*

Physical Review B, 83(14), p.140408_1 - 140408_4, 2011/04

 Times Cited Count:22 Percentile:65.84(Materials Science, Multidisciplinary)

Zero-field $$^{115}$$In-nuclear magnetic resonance (NMR) has been used to study single crystals of CePt$$_{2}$$In$$_{7}$$, a heavy-fermion antiferromagnet with a N$'e$el temperature ($$T_{rm N}$$) of 5.2 K at ambient pressure. Narrow linewidths of $$^{115}$$In-nuclear quadrupolar resonance (NQR) 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$$nu_{rm Q}$$ 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 antiferromagnetic (AFM) orders at ambient pressure and that the commensurate ordering is stabilized by increasing pressures where bulk superconductivity emerges.

Oral presentation

NQR/NMR study of antiferromagnet CePt$$_2$$In$$_7$$ using single crystals

Sakai, Hironori; Tokunaga, Yo; Kambe, Shinsaku; Lee, H.*; Sidorov, V. A.*; Tobash, P. H.*; Ronning, F.*; Bauer, E. D.*; Thompson, J. D.*

no journal, , 

We have performed NQR/NMR study for antiferromagnet CePt$$_2$$In$$_7$$ using single crystals. In the paramagnet state, we have observed the NQR lines for $$^{115}$$In nuclei under zero field, which have been succeeded to be assigned to the crystallographically different sites of In(1), In(2), and In(3). In the antiferromagnetically ordered state, the NQR lines become broadened and split, due to the internal fields on the respective sites. From the spectral analyses, we have found the coexistence of incommensurate and commensurate antiferromagnetic orderings and the stabilization of commensurate antiferromagnetism with applying pressure.

Oral presentation

NQR/NMR Study of antiferromagnet CePt$$_2$$In$$_7$$ using single crystals, 2

Sakai, Hironori; Tokunaga, Yo; Kambe, Shinsaku; Lee, H.*; Sidorov, V. A.*; Tobash, P. H.*; Ronning, F.*; Bauer, E. D.*; Thompson, J. D.*

no journal, , 

Antiferromagnet CePt$$_2$$In$$_7$$ with the N$'e$el temperature $$T_N$$ of 5.2 K has a similar crystal structure to the well-known heavy-fermion superconductor CeCoIn$$_5$$ and the pressure-induced superconductor CeRhIn$$_5$$. We have performed the NQR/NMR studies using the single crystals of CePt$$_2$$In$$_7$$. On the basis of spectral analysis in the antiferromagnetic state, incommensurate antiferromagnetic state has been found to become stabilized well below $$T_N$$ under ambient pressure. We also have found that the commensurate antiferromagnetic state overcomes by applying pressure.

Oral presentation

Pressure-induced superconductor CePt$$_2$$In$$_7$$; NQR/NMR study using single crystals

Sakai, Hironori; Tokunaga, Yo; Kambe, Shinsaku; Lee, H.-O.*; Sidorov, V. A.*; Tobash, P. H.*; Ronning, F.*; Bauer, E. D.*; Thompson, J. D.*

no journal, , 

no abstracts in English

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