Search for Multipolar Instability in URu${}_2$Si${}_2$ Studied by Ultrasonic Measurements under Pulsed Magnetic Field

T. Yanagisawa, S. Mombetsu, H. Hidaka +10

The elastic properties of URu${}_2$Si${}_2$ in the high-magnetic field region above 40 T, over a wide temperature range from 1.5 to 120 K, were systematically investigated by means of…