Complex magnetic states of heavy fermion compound CeGe

Complex magnetic states of heavy fermion compound CeGe

Haines, C.R.S. ; Marcano, N. ; Smith, R.P. ; Aviani, I. ; Espeso, J.I. ; Gómez Sal, J.C. ; Saxena, S.S.

Тема: Магнетизм

Інший ID: PACS: 71.27.+a, 75.50.–y, 75.50.Ee

URI: http://dspace.nbuv.gov.ua/handle/123456789/117273

Посилання: Complex magnetic states of heavy fermion compound CeGe / C.R.S. Haines, N. Marcano, R.P. Smith, I. Aviani, J.I. Espeso, J.C. Gómez Sal, S.S. Saxena // Физика низких температур. — 2012. — Т. 38, № 7. — С. 821-827. — Бібліогр.: 12 назв. — англ.

Підтримка: We thank Gil Lonzarich, Cheng Liu, Mark Dean, Mike Sutherland, Stephen Rowley, Valentina Sirenko and Victor Eremenko for useful discussions. This work was supported by EPSRC, the European ECOM COST Action P16 ESF Intelbiomat and the Spanish MEC. The authors wish to thank the following organizations for financial support — C.R.S. Haines acknowledges Corpus Christi College, S.S. Saxena acknowledges Jesus College.

Дата: 2012

Завантажень: 524

Complex magnetic states of heavy fermion compound CeGe

Анотація:

The intermetallic compound CeGe exhibits unusual magnetic behavior due to the interplay between the Kondo and the antiferromagnetic coupling. This particular system is interesting because the Kondo temperature is close to the Néel temperature, resulting in a close competition between the low-temperature interactions, which can be tuned by means of varying external parameters such as pressure and applied magnetic field. Interestingly, magnetization measurements up to 12 kbar reveal that the Néel temperature is not affected by pressure. Measurements of the electrical resistivity, however, show that the sharp upturn appearing below TN is sensitive to pressures up to 15 kbar. This suggests that pressure may change the complex antiferromagnetic spin structure. The validity of an explanation based on the magnetic superzones seen in the rare earths is discussed here.

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