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Anisotropic magnetoresistance in spin-orbit semimetal .
Dirk J Groenendijk1, Nicola Manca1, Joeri de Bruijckere1
1Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands.
European Physical Journal Plus
|August 25, 2020
Summary
Researchers investigated the anisotropic magnetoresistance (AMR) in Ruddlesden-Popper iridates, revealing a field-induced magnetic state. This study links electronic transport and magnetic order in these complex materials.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Solid-State Physics
Background:
- Ruddlesden-Popper iridates are 3D materials exhibiting complex electronic behavior.
- The interplay of spin-orbit coupling and Coulomb repulsion governs their properties.
- Understanding their magnetic and electronic states is crucial for novel applications.
Purpose of the Study:
- To investigate the anisotropic magnetoresistance (AMR) in thin films of a specific Ruddlesden-Popper iridate.
- To probe the correlations between electronic transport, magnetic order, and orbital states.
- To understand the origin of observed magnetoresistance phenomena.
Main Methods:
- Fabrication of thin films of the target Ruddlesden-Popper iridate.
- Measurement of anisotropic magnetoresistance (AMR) at low temperatures.
- Analysis of the angular dependence of magnetoresistance with varying magnetic field orientation.
Main Results:
- Observed low-temperature negative magnetoresistance that is anisotropic with magnetic field orientation.
- Discovered a fourfold symmetric AMR component emerging above a critical magnetic field.
- Attributed this component to magnetocrystalline effects and a field-induced magnetic state.
Conclusions:
- The anisotropic magnetoresistance in these iridates is sensitive to magnetic field orientation.
- A field-induced magnetic state transition occurs in this material.
- The findings provide insights into the complex electronic and magnetic properties of Ruddlesden-Popper iridates.
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