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The Magnetic Characterization of Iron-Chrome nanoparticle

Virdian, Angga LU (2018) FYSM60 20181
Synchrotron Radiation Research
Department of Physics
Abstract
In this thesis, the intrinsic magnetic characteristic of 10 nm FeCr oxide nanoparticles is studied. The nanoparticles is produced using the method of Spark discharge generation. Scanning electron microscope (SEM) is used to characterize the size distribution and coverage of deposited particle. Magnetic characterization is carried out using a magnetometer equipped with superconducting quantum interference device (SQUID). Temperature and external magnetic eld dependent measurements
are done to study the magnetic properties. The image of surface reveals the majority of nanoparticle has the size of 9 to 12 nm. At this size the particle can be assumed single-domain state. The particle coverage is considered low with one particle per 10404... (More)
In this thesis, the intrinsic magnetic characteristic of 10 nm FeCr oxide nanoparticles is studied. The nanoparticles is produced using the method of Spark discharge generation. Scanning electron microscope (SEM) is used to characterize the size distribution and coverage of deposited particle. Magnetic characterization is carried out using a magnetometer equipped with superconducting quantum interference device (SQUID). Temperature and external magnetic eld dependent measurements
are done to study the magnetic properties. The image of surface reveals the majority of nanoparticle has the size of 9 to 12 nm. At this size the particle can be assumed single-domain state. The particle coverage is considered low with one particle per 10404 nm^2, thereby minimizing interparticle magnetic dipole-dipole interactions. Magnetic characteristics reveal the magnetic moment dynamic as the variation of thermal energy. The magnetic characterization reveals that the nanoparticles are superparamagnetic with a blocking temperature of 51 K. At a temperature of 2 K, the nanoparticles are in a blocked state and exhibit magnetic hysteresis similar to a ferromagnetic system. The future of magnetic nanoparticle lies on the alloyedparticle that consists of two or more elements. This research act as a preliminarystudy of alloy using Iron chrome oxide as test system before advancing to the more complex system. (Less)
Popular Abstract
The understanding of magnetism has always been a substantial achievement of humankind. Magnetic materials are used everywhere in the society, from data storage in hard drives to magnetic resonance imaging (MRI) in hospitals. Magnetic materials are also essential components in technologies that convert electric power into motion or vice versa, and thus play a key role in the replacement of fossil fuels in vehicles and the transition to renewable energy sources. Nanomagnetism is a branch of physics that deals with the magnetic behavior of the nanoscale objects such as metallic nanoparticles. Magnetic nanoparticle has been applied into various field. Iron oxide is an example of versatile material that works in MRI imaging, data storage and in... (More)
The understanding of magnetism has always been a substantial achievement of humankind. Magnetic materials are used everywhere in the society, from data storage in hard drives to magnetic resonance imaging (MRI) in hospitals. Magnetic materials are also essential components in technologies that convert electric power into motion or vice versa, and thus play a key role in the replacement of fossil fuels in vehicles and the transition to renewable energy sources. Nanomagnetism is a branch of physics that deals with the magnetic behavior of the nanoscale objects such as metallic nanoparticles. Magnetic nanoparticle has been applied into various field. Iron oxide is an example of versatile material that works in MRI imaging, data storage and in cancer treatment. Magnetic nanoparticles could also be used as the building blocks for next generation of permanent magnetic materials for green technologies such as electric vehicles and wind turbines. This thesis is a part of a larger research project with the aim of studying magnetic nanoparticles consisting of dierent magnetic elements, so-called alloys. The long-term goal of this project is to use nanoparticles to produce magnetic materials with performance rivaling today's strongest magnets but using cheaper and more sustainable materials. To determine the magnetic properties of nanoparticles, it is essential that they are not nearby and thereby influence each other. The goal of this thesis is to explore the possibility of studying low coverage of alloyed magnetic nanoparticles that are sufficiently far apart to not influence each other. This will be achieved by depositing the low coverage on a substrate with low magnetic signal and measuring the properties of the particles with an ultra-sensitive magnetometer,a so-called superconducting quantum interference device. (Less)
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author
Virdian, Angga LU
supervisor
organization
course
FYSM60 20181
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Nanomagnetism, Nanoparticle
language
English
id
8955082
date added to LUP
2018-08-09 12:27:17
date last changed
2018-08-09 12:27:17
@misc{8955082,
  abstract     = {In this thesis, the intrinsic magnetic characteristic of 10 nm FeCr oxide nanoparticles is studied. The nanoparticles is produced using the method of Spark discharge generation. Scanning electron microscope (SEM) is used to characterize the size distribution and coverage of deposited particle. Magnetic characterization is carried out using a magnetometer equipped with superconducting quantum interference device (SQUID). Temperature and external magnetic eld dependent measurements
are done to study the magnetic properties. The image of surface reveals the majority of nanoparticle has the size of 9 to 12 nm. At this size the particle can be assumed single-domain state. The particle coverage is considered low with one particle per 10404 nm^2, thereby minimizing interparticle magnetic dipole-dipole interactions. Magnetic characteristics reveal the magnetic moment dynamic as the variation of thermal energy. The magnetic characterization reveals that the nanoparticles are superparamagnetic with a blocking temperature of 51 K. At a temperature of 2 K, the nanoparticles are in a blocked state and exhibit magnetic hysteresis similar to a ferromagnetic system. The future of magnetic nanoparticle lies on the alloyedparticle that consists of two or more elements. This research act as a preliminarystudy of alloy using Iron chrome oxide as test system before advancing to the more complex system.},
  author       = {Virdian, Angga},
  keyword      = {Nanomagnetism,Nanoparticle},
  language     = {eng},
  note         = {Student Paper},
  title        = {The Magnetic Characterization of Iron-Chrome nanoparticle},
  year         = {2018},
}