Jelena Trbovic

Jelena Trbovic is an Application Scientist at Zurich Instruments, where she manages nanotechnology and magnetism applications and the MFLI Lock-in Amplifier. She received her PhD from Florida State University for research on semiconductor spintronics. As a postdoc at the University of Basel, she studied quantum transport in carbon nanotubes, quantum dots, graphene, and superconducting wires. Jelena enjoys interacting with researchers, discussing the fundamentals of lock-in detection and the importance of good measurement practice. She is passionate about developments in quantum technologies, and enjoys learning new ways to interpret data as well as sports she never practiced before.

How to Set up Lock-in Measurements in the Presence of Large Spurious Voltages

01.09.2022

Signal Inputs section of the Lock-in Tab in LabOne UI

Lock-in amplifiers are extremely versatile and used in a plethora of applications ranging from optics and photonics, nanotechnology, spm, and sensing, among others. In this blog, you will learn how to use the MFLI Lock-in Amplifier to carefully assess the experimental conditions and prepare your setup for the best measurement outcome.

How to Characterize Magnetic Materials With Lock-in Amplifiers

15.07.2021

In this webinar we covered two basic magnetic characterization techniques, the vibrating sample magnetometry (VSM) and AC susceptibility where lock-in amplifiers are essential part of the measurement and the detection chain. We teamed up with Yury Bugoslavsky, who is managing VSM products at Cryogenic Ltd...

Probing Local Magnetic Field Patterns - Q&A

26.02.2021

For this webinar we teamed up with Prof. Martino Poggio , whose work focuses on understanding the physics of materials and phenomena that is strongly dependent on the local conditions, be it by impurities or through the design through local probing of magnetic fields coming from currents and magnetization. Several...

Getting Additional Insights into Your Setup with the MF-DIG Option

08.11.2020

Lock-in amplifiers are at their best when rejecting the noise and increasing the signal-to-noise ratio. When the setup is well characterized the measurements are carried out at a single frequency and measured against external parameters. Throughout the measurement, detailed noise spectra reveal critical changes in the physics of the experiment...

The Many Applications of the MF-MD Multi-Demodulator Option

24.08.2020

In my research days, lock-in amplifiers were a standard fixture in a transport measurement setup, and there were many of them. Each lock-in measured one signal in the experiment. Adding more lock-in amplifiers in the setup was the only way to learn more about the device transport properties, but this...

Nanostructure Transport Characterization - Q&A

25.05.2020

Thank you to everyone who attended the "Nanostructure transport characterization" Webinar. It was my first webinar and it was an amazing experience for the whole team. We received a lot of questions and in this post I will answer most of them by grouping them into four categories: Measurement tools...

Demodulating Down to DC with the HF2LI

18.11.2014

Many of our customers use the possibility to measure DC voltage and current, together with an ac signal by setting the demodulation frequency ω=0. The measured value is seemingly incorrect as you need to divide the obtained rms value with the factor of √2 to get the actual signal amplitude...