Characteristic crossing point ($T_{\ast}\approx 2.7$ K) in specific-heat curves of samples RuSr$_2$Gd$_{1.5}$Ce$_{0.5}$Cu$_2$O$_{10-δ}$ taken for different values of magnetic field

Details Characteristic crossing point ($T_{\ast}\approx 2.7$ K) in specific-heat curves of samples RuSr$_2$Gd$_{1.5}$Ce$_{0.5}$Cu$_2$O$_{10-δ}$ taken for different values of magnetic field Characteristic crossing point ($T_{\ast}\approx 2.7$ K) in specific-heat curves of samples RuSr$_2$Gd$_{1.5}$Ce$_{0.5}$Cu$_2$O$_{10-δ}$ taken for different values of magnetic field

2009-10-13

arxiv.org/abs/0910.2384v1

J. Phys.: Condens. Matter 21 (2009) 455602 (7pp)

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, 7 figures, submitted to J. Phys.: Condens. Matter

Scientific paper

10.1088/0953-8984/21/45/455602

Magnetic properties of polycrystalline samples of RuSr$_2$(Gd$_{1.5}$Ce$_{0.5}$)Cu$_{2}$O$_{10-\delta}$, as-prepared (by solid-state reaction) and annealed (12 hours at 845$^{\circ}$C) in pure oxygen at different pressure (30, 62 and 78 atm) are presented. Specific heat and magnetization were investigated in the temperature range 1.8--300 K with a magnetic field up to 8 T. Specific heat, $C(T)$, shows a jump at the superconducting transition (with onset at $T\approx 37.5$ K). Below 20 K, a Schottky-type anomaly becomes apparent in $C(T)$. This low-temperature anomaly can be attributed to splitting of the ground term ${^8}S_{7/2}$ of paramagnetic Gd$^{3+}$ ions by internal and external magnetic fields. It is found that curves $C(T)$ taken for different values of magnetic field have the same crossing point (at $T_{\ast}\approx 2.7$ K) for all samples studied. At the same time, $C(H)$ curves taken for different temperatures have a crossing point at a characteristic field $H_{\ast}\approx 3.7$ T. These effects can be considered as manifestation of the crossing-point phenomenon which is supposed to be inherent for strongly correlated electron systems.

Affiliated with

Also associated with

No associations

Rating

Characteristic crossing point ($T_{\ast}\approx 2.7$ K) in specific-heat curves of samples RuSr$_2$Gd$_{1.5}$Ce$_{0.5}$Cu$_2$O$_{10-δ}$ taken for different values of magnetic field does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Characteristic crossing point ($T_{\ast}\approx 2.7$ K) in specific-heat curves of samples RuSr$_2$Gd$_{1.5}$Ce$_{0.5}$Cu$_2$O$_{10-δ}$ taken for different values of magnetic field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Characteristic crossing point ($T_{\ast}\approx 2.7$ K) in specific-heat curves of samples RuSr$_2$Gd$_{1.5}$Ce$_{0.5}$Cu$_2$O$_{10-δ}$ taken for different values of magnetic field will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-640977