Scaling of the magnetic entropy and magnetization in YbRh2(Si0.95Ge0.05)2

Gegenwart, P.; Tokiwa, Y.; Neumaier, K.; Geibel, C.; Steglich, F.

doi:10.1016/j.physb.2004.12.044

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Scaling of the magnetic entropy and magnetization in YbRh₂(Si_0.95Ge_0.05)₂

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Gegenwart, P.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Tokiwa, Y.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Geibel, C.
Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Steglich, F.
Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Gegenwart, P., Tokiwa, Y., Neumaier, K., Geibel, C., & Steglich, F. (2005). Scaling of the magnetic entropy and magnetization in YbRh₂(Si_0.95Ge_0.05)₂. Physica B-Condensed Matter, 359-361, 23-25. doi:10.1016/j.physb.2004.12.044.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0015-2CF5-9

Abstract

The magnetic entropy of YbRh2(Si0.95Ge0.05)2YbRh2(Si0.95Ge0.05)2 is derived from low-temperature View the MathML source(T⩾18mK) specific heat measurements. Upon field tuning the system to its antiferromagnetic quantum critical point unique temperature over magnetic field scaling is observed indicating the disintegration of heavy quasiparticles. The field dependence of the entropy equals the temperature dependence of the DC-magnetization as expected from the Maxwell relation. This proves that the quantum-critical fluctuations affect the thermal and magnetic properties in a consistent way.