J. Phys. Soc. Jpn. 75S (2006) pp. 183-186  |Previous Article| |Next Article|  |Table of Contents|
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Proc. of 5th Int. Symposium on ASR-WYP-2005 – Advances in the Physics and Chemistry of Actinide Compounds –

Specific Heat Measurements on a Modulated Quadrupolar Ordering Compound PrPb₃ at Very Low Temperatures

Takaaki Morie, Takahiro Onimaru, Yoshimoto Karaki, Toshiro Sakakibara, Jeroen Custers and Hiroyuki. S. Suzuki¹

Specific heat of the cubic compound PrPb₃ has been measured at zero field in a temperature range from 0.03 to 2 K. We focused our attention on the electronic state in the antiferroquadrupole (AFQ) phase below the ordering temperature T_Q=0.4 K. A large nuclear contribution to the specific heat is observed below ∼50 mK, indicating a nuclear quadrupole splitting due to the symmetry reducing AFQ ordering of 4f electrons. Subtracting the nuclear contribution from the total specific heat yielded a large T-linear contribution, suggesting a strong mass enhancement of the electronic system in the ground state.

URL: http://jpsj.ipap.jp/link?JPSJS/75S/183/
DOI: 10.1143/JPSJS.75S.183

References

1. W. Gross, K. Knorr, A. P. Murani and K. H. J. Buschow: Z. Phys. B 37 (1980) 123.
2. M. Niksch, W. Assmus, B. Luthi, H. R. Ott and J. K. Kjems: Helv. Phys. Acta 55 (1982) 688.
3. D. Aoki, Y. Katayama, R. Settai, Y. Inada, Y. Ōnuki, H. Harima and Z. Kletowski: J. Phys. Soc. Jpn. 66 (1997) 3988[JPSJ].
4. T. Tayama, T. Sakakibara, K. Kitami, M. Yokoyama, K. Tenya, H. Amitsuka, D. Aoki, Y. Ōnuki and Z. Kletowski: J. Phys. Soc. Jpn. 70 (2001) 248[JPSJ].
5. E. Bucher, K. Andres, A. C. Grossard and J. P. Maita: J. Low Temp. Phys. 72 (1972) 322.
6. P. Morin, D. Schmitt and E. du Tremolet de Lacheisserie: J. Magn. Magn. Mater. 30 (1982) 257[CrossRef].
7. T. Kawae, M. Shimogai, M. Mito, K. Takeda, H. ishii and T. Kitai: Phys. Rev. B 65 (2001) 012409[APS].
8. T. Kawae, T. Yamamoto, K. Yurue, N. Tateiwa, K. Takeda and T. Kitai: J. Phys. Soc. Jpn. 72 (2003) 2141[JPSJ].
9. T. Onimaru, T. Sakakibara, A. Harita, T. Tayama, D. Aoki and Y. Ōnuki: J. Phys. Soc. Jpn. 73 (2004) 2377[JPSJ].
10. T. Onimaru, T. Sakakibara, N. Aso, H. Yoshizawa, H. S. Suzuki and T. Takeuchi: Phys. Rev. Lett. 94 (2005) 197201[APS].
11. A. Yatskar, W. P. Beyermann, R. Movschovich and P. C. Canfield: Phys. Rev. Lett. 77 (1996) 3637[APS].
12. S. Abe, D. Takahashi, H. Mizuno, A. Ryu, S. Asada, S. Nahaer, K. Matsumoto, H. Suzuki and T. Kitai: Physica B 329 (2003) 637.
13. D. L. Cox: Phys. Rev. Lett. 59 (1987) 1240[APS].