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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology

Thursday , 23 April 2015
(at 13:00 in room HAL 115 )
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Magnetic properties of a quantum magnet

Luis Pedrero Ojeda

TU Dresden

In this talk I will discuss the magnetic properties of a Quantum Magnet and the formalist of the BEC of magnons in the system. In the first part of the talk I will present magnetization measurements performed at very low temperatures of the tetragonal organic system (known as DTN) which is a quantum magnet where the Ni atoms are weakly coupled forming S = 1 chains along the crystallographic c axis. At the second part I will explain the main characteristics of the in a Faraday Magnetometer (FM) setup, as well as the common experimental problems. I will also talk about phase transitions in different paramagnets and other systems which present similar phenomena. We have performed several isofeld M(T) and isothermal M(H) magnetization measurementsto obtain a magnetization grid M(T;H) across the magnetic phase diagram. The idea behind is to investigate the existence of a possible quantum critical point at the critical field 2 T. Such a quantum critical point belongs to the d = 3 and z= 2 universality class and the following theoretical laws are predicted.

Brief Bio:

Luis Pedrero studied Electrical Engineering at the National Polytechnic institute in Mexico City. He obtained his Engineering and Master degree in solid state electronics and worked several years in the electronics industry in Mexico. After obtaining his Doctoral degree in Physics at the Max Planck Institute of Chemical physics of Solids in Dresden, he worked as a postdoc on several low temperature physics projects. Shortly after he took on a position as a group leader at the Institute of Semiconductors and Microsystems (IHM) at the TU Dresden.

Announcement (pdf)

Invited by G. Cuniberti

Within the nanoSeminar

last modified: 2021.05.05 Wed
author: webadmin