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  Magnetic Field Response in (UTh)Be13

Kromer, F., Oeschler, N., Tayama, T., Tenya, K., Cichorek, T., Lang, M., et al. (2002). Magnetic Field Response in (UTh)Be13. Journal of Low Temperature Physics, 126(3-4), 815-833. doi:10.1023/A:1013984905840.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-31B1-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-00E7-D
Genre: Journal Article

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 Creators:
Kromer, F.1, Author              
Oeschler, N.1, Author              
Tayama, T.1, Author              
Tenya, K.1, Author              
Cichorek, T.1, Author              
Lang, M.1, Author              
Steglich, F.2, Author              
Kim, J. S., Author
Stewart, G. R., Author
Affiliations:
1Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
2Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863467              

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 Abstract: We report on recent magnetic field studies on U1-xThxBe13 with x less than or equal to 0.1. These new results are related to previous data published by Kromer et al. [F. Kromer et al., Phys. Rev. B 62, 12477 (2000)]. The new magnetization measurements confirm the existence of an anomaly found earlier through calorimetric and dilatometric measurements at T-L < T-C for x < x(c1) approximate to 0.019. In the critical concentration range x(cl) < x < x(c2) approximate to 0.0455, the critical-field curves for the mean-field type of phase transition that occur at T-c1 and T-c2 (at zero field) appear to merge as T --> 0. This interesting fact which has been inferred already from the previous measurements could be confirmed for a sample with x = 0.038. The normal state for Th concentrations x approximate to x(c2) is rather unusual: A negative normal-state contribution, alpha(n), is observed in the thermal expansion coefficient as well as the occurrence of a positive peak when superconductivity is suppressed by a magnetic field. Both effects are studied in detail and a comparison to specific heat results is given. Finally, we have investigated the non-linear contribution to the magnetization, chi((3)), of UBe13 and U0.9Th0.1Be13. In contradiction to suggestions made previously by Aliev et al. [Aliev et al., Europhys. Lett. 32, 765 (1995)] for x=0.1, chi((3)) remains negative down to T approximate to 100 mK, the lowest temperature investigated.

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Language(s): eng - English
 Dates: 2002-02
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 17775
ISI: 000174163100004
DOI: 10.1023/A:1013984905840
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Title: Journal of Low Temperature Physics
  Alternative Title : J. Low Temp. Phys.
Source Genre: Journal
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Pages: - Volume / Issue: 126 (3-4) Sequence Number: - Start / End Page: 815 - 833 Identifier: ISSN: 0022-2291