Ferromagnetic order in Yb(Rh$_{0.73}$Co$_{0.27}$)$_{2}$Si$_{2}$

S. Lausberg; A. Hannaske; A. Steppke; L. Steinke; T. Gruner; C. Krellner; C. Klingner; M. Brando; C. Geibel; F. Steglich

paper

Ferromagnetic order in Yb(Rh $_{0.73}$ Co $_{0.27}$ ) $_{2}$ Si $_{2}$

arXiv:1210.1345

Abstract

We present the discovery of ferromagnetism in single crystalline Yb(Rh $_{0.73}$ Co $_{0.27}$ ) $_{2}$ Si $_{2}$ below $T_{C} = 1.30$ K with a spontaneous magnetic moment of $0.1 μ_{B}$ /Yb along the crystallographic c-axis. This is shown by the huge c-susceptibility peak, the hysteresis in magnetization as well as by the field-dependent susceptibility and specific heat data. This discovery motivates the reinvestigation of the magnetic order in Yb(Rh $_{1 - x}$ Co $_{x}$ ) $_{2}$ Si $_{2}$ with $x < 0.27$ and in pure YbRh $_{2}$ Si $_{2}$ under small pressures with field along the $c$ -direction to look for low-lying ferromagnetic order.

5 pages, 4 figures

Ferromagnetic order in Yb(Rh0.73​Co0.27​)2​Si2​

Abstract

Ferromagnetic order in Yb(Rh $_{0.73}$ Co $_{0.27}$ ) $_{2}$ Si $_{2}$