Experimental validation of the predicted emergent magnetism in diamagnetic cadmium sulfide (Cds) doped with boron

The large and persistent photoconductivity displayed by some semiconductors provides a way to control magnetism with light, through illumination-control of free carrier concentration and thereby magnetic interaction in dilute magnetic semiconductors. CdS is a wide band-gap semiconductor that displays large and persistent photoconductivity and is predicted to become magnetic when doped with certain dopants such as Boron[1]. In this work, we experimentally test the prediction of magnetic CdS:B, and lay groundwork for testing the hypothesis that magnetism can be controlled by photoconductivity. We make CdS:B nanoparticles by co-precipitation[2]. We use X-ray diffraction and plasma optical emission spectroscopy to quantify boron doping. We use magnetometry to confirm the presence of magnetic B.

Name thesis:degree_name

Bachelor

Department dc:contributor.department

Massachusetts Institute of Technology. Department of Materials Science and Engineering

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2020

Author dc:creator

• Azhar, Bilal.

Advisor dc:contributor.advisor

• Jaramillo, Rafael

• Materials Science and Engineering.

Statement dc:rights

• MIT theses may be protected by copyright. Please reuse MIT thesis content according to the MIT Libraries Permissions Policy, which is available through the URL provided.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

https://hdl.handle.net/1721.1/132613

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/132613