Academic Journal
Elucidating the lack of magnetic order in the heavy-fermion CeCu2Mg
| العنوان: | Elucidating the lack of magnetic order in the heavy-fermion CeCu2Mg |
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| المؤلفون: | Michor, H., Sereni, J. G., GIOVANNINI, MAURO, Kampert, E., Salamakha, L., Hilscher, G., BAUER, ERNST |
| المساهمون: | Michor, H., Sereni, J. G., Giovannini, Mauro, Kampert, E., Salamakha, L., Hilscher, G., Bauer, Ernst |
| بيانات النشر: | American Physical Society |
| سنة النشر: | 2017 |
| المجموعة: | Università degli Studi di Genova: CINECA IRIS |
| مصطلحات موضوعية: | Electronic, Optical and Magnetic Material, Condensed Matter Physics |
| الوصف: | Magnetic, transport, and thermal properties of CeCu2Mg are investigated to elucidate the lack of magnetic order in this heavy-fermion compound with a specific heat value, Cmag/T|T→0≈1.2 J/mol K2 and robust effective magnetic moments (μeff≈2.46μB). The lack of magnetic order is attributed to magnetic frustration favored by the hexagonal configuration of the Ce sublattice. In fact, the effect of magnetic field on Cmag/T and residual resistivity ρ0 does not correspond to that of a Fermi liquid (FL) because a broad anomaly appears at Tmax≈1.2 K in Cmag(T)/T, without changing its position up to μ0H=7.5 T. However, the flattening of Cmag/T|T→0 and its magnetic susceptibility χT→0, together with the T2 dependence of ρ(T), reveal a FL behavior for T≤2 K which is also supported by Wilson and Kadowaki-Woods ratios. The unusual coexistence of FL and frustration phenomena can be understood by placing paramagnetic CeCu2Mg in an intermediate section of a frustration-Kondo model. The entropy, Smag, reaches 0.87Rln6 at T≃100 K, with a tendency to approach the expected value Smag=Rln6 of the J=5/2 ground state of Ce3+. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | STAMPA |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/wos/WOS:000399140700002; volume:95 (11); firstpage:115146-1; lastpage:115146-7; numberofpages:7; journal:PHYSICAL REVIEW. B; http://hdl.handle.net/11567/866776; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85016318180 |
| DOI: | 10.1103/PhysRevB.95.115146 |
| الاتاحة: | http://hdl.handle.net/11567/866776 https://doi.org/10.1103/PhysRevB.95.115146 |
| Rights: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.9DEE7EC3 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1103/PhysRevB.95.115146 |
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