<p>Vertically aligned nanocomposite
(VAN) thin films are a promising thin-film platform that allows the combination
of a highly desired material with another complementary oxide. Traditionally,
VANs have been limited to combining an oxide with another oxide which has shown
a wide range of functionality, and, by adjusting the different growth
parameters, it has led to the tuning of their physical properties. While VANs
have already shown to be an effective platform with immense potential, further
enhancement of physical properties can be performed by replacing one of the oxides
with a metal forming metal-oxide VANs. </p>
<p>In this dissertation, by the inclusion of the 3d transition
metals, e.g., Fe and Co, into various oxide matrices, such as La<sub>0.5</sub>Sr<sub>0.5</sub>FeO<sub>3</sub>,
BaZrO<sub>3</sub>, and BaTiO<sub>3</sub>, strong, highly anisotropic,
ferromagnetic properties have been achieved. By varying the growth parameters,
tunable physical properties, mainly coercivity and anisotropic ratio, have been
demonstrated. Furthermore, in the case of Co-BaZrO<sub>3</sub>, a multi-layer
stack has been successfully grown and demonstrated a tailorable magnetoresistance.
Additionally, a novel system by combining Fe pillars into a BaTiO<sub>3</sub>
matrix has been demonstrated. This new system allows for the combination of the
room temperature Fe ferromagnetic properties with the ferroelectric properties
of BaTiO<sub>3</sub>, allowing for coupling between the two with coercivity
tuning and tailorable ferromagnetic
properties. </p>
<p>Lastly, it has been shown a possible framework by adding additional
metals into the existing metal-oxide VAN platform. By adding the third phase,
another metal, it opens up a new avenue to induce additional functionality
while creating a method to introduce coupling between the different metals and
physical properties. </p>
<br>
| Identifer | oai:union.ndltd.org:purdue.edu/oai:figshare.com:article/12670688 |
| Date | 05 August 2020 |
| Creators | Bruce Zhang (9137693) |
| Source Sets | Purdue University |
| Detected Language | English |
| Type | Text, Thesis |
| Relation | https://figshare.com/articles/thesis/INTEGRATION_OF_FERROMAGNETIC_METALS_IN_VERTICALLY_ALIGNED_NANOSTRUCTURES_FOR_SPINTRONICS/12670688 |
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