HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS

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HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS ( handbook-onphysics-and-chemistry-rare-earths )

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5 4 3 2 1 0 0.00 FIG. 11 0.04 0.06 0.08 T (K) YbRh2Si2 B || ab B=0 0.02 T 0.03T 0.04 T 0.06 T 0.10 0.12 1.5 1.0 0.5 0.0 0.1 1 FIG. 12 Quantum Critical Matter and Phase Transitions Chapter 280 313 YbRh2Si2 B || ab B = 0.06 T 0.1 T 0.15 T 0.25 T 0.5 T 1T 1.5 T Specific heat in various magnetic fields for YbRh2Si2, left: low fields H right: H ! 0.06 T 1⁄4 Hc. Note the quenching of antiferromagnetic order (lambda transition) with field and the logarithmic upturn that becomes constant at very large fields. According to Oeschler, N., Hartmann, S., Pikul, A.P., Krellner, C., Geibel, C., Steglich, F., 2008. Low-temperature specific heat of YbRh2Si2. Phys. B Condens. Matter 403 (5), 1254-1256. 12 0.04 B(T) 80 2.7 0.96 0 p (GPa) T (K) 0.06 T; 10 0.03 8 6 0.05 4 0.075 2 0.123 0 0.01 0.1 60 40 20 0 1 10 0 ac-susceptibility of YbRh2Si2 in small magnetic field approaching the QCP. wac gives indications of ferromagnetic freezing in small fields that become smeared out as the eternal field is increased. The inset shows the full r(T) behavior with the large high T resistivities and mini- mum pressure dependences. According to Trovarelli, O., Geibel, C., Mederle, S., Langhammer, C., Grosche, F.M., Gegenwart, P., Lang, M., Sparn, G., Steglich, F., 2000. YbRh2Si2: pronounced non-Fermi-liquid effects above a low-lying magnetic phase transition. Phys. Rev. Lett. 85 (3), 626. 0 100 200 300 100 T (K) T (K) χac (10–6 m3 / mol) r (μΩ cm) Cel/T (J/mol K2) Cel/T (J/mol K2)

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