Ac Susceptibility and Static Magnetization Measurements of CeRu$_2$Si$_2$ at Small Magnetic Fields and Ultra Low Temperatures

2); (2)Physics Department; (3)Graduate School of Science; D. A. Tayurskii (1; D. Takahashi (1); H. Mizuno (1); H. Suzuki (1); Kanazawa University; Kazan State University; K. Matsumoto (1)

arxiv: cond-mat/0212238 · v2 · pith:YYBGV2KLnew · submitted 2002-12-11 · ❄️ cond-mat.str-el

Ac Susceptibility and Static Magnetization Measurements of CeRu₂Si₂ at Small Magnetic Fields and Ultra Low Temperatures

D. Takahashi (1) , S. Abe (1) , H. Mizuno (1) , D. A. Tayurskii (1 , 2) , K. Matsumoto (1) , H. Suzuki (1) , Y. \'Onuki (3) ((1)Department of Physics

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Kanazawa University (2)Physics Department Kazan State University (3)Graduate School of Science Osaka University)

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keywords magneticcerutemperaturesdownfieldsmagnetizationsmallstatic

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The magnetic properties of CeRu$_2$Si$_2$ at microkelvin temperatures (down to 170 $\mu$K) and ultra small magnetic fields ($0.02\sim6.21$ mT) are investigated experimentally for the first time. The simultaneously measured ac susceptibility and static magnetization show neither evidence of the magnetic ordering, superconductivity down to the lowest temperatures nor conventional Landau Fermi-Liquid behavior. The results imply the magnetic transition temperature in undoped CeRu$_2$Si$_2$ is very close to absolute 0 K. The possibility for proximity of CeRu$_2$Si$_2$ to the quantum critical point without any doping is discussed.

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Ac Susceptibility and Static Magnetization Measurements of CeRu₂Si₂ at Small Magnetic Fields and Ultra Low Temperatures

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