Department of Physics

Postgraduate research profiles


Nils Ross

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Nils Ross


Ferromagnetic resonance and dynamic microwave characterization of assemblies of magnetic nanostructures


The magnetic properties of nanostructured materials have been and remain of intense interest in both fundamental and applied science. Magnetic nanostructures are currently being investigated for magnetic random access memory, high frequency spintronic devices, bit patterned media, biological applications, and microwave absorption for both civilian and military applications. My thesis work relates to the fabrication of ordered and semi-ordered trigonal arrays of magnetic disks of sub-micrometre dimensions via a self-assembly technique, and the measurement of the microwave absorption properties of these arrays. In addition, I have performed some measurements of microwave absorption properties of iron-oxide nanoparticles dispersed in non-magnetic polymers.

Why my research is important

The absorption properties of self-organised nanostructures are of interest in a fundamental scientific sense since the absorption properties of arrays are related not only to the properties of the members of the array but to the coupling between members. As such, dense nanomagnet arrays represent experimentally accessible ‘model systems’ in which to observe collective phenomena. They are of technological interest because coupling and magnetic switching times in semi-ordered self-organised arrays may be of interest in future spintronics and data storage devices. The absorption properties of assemblies of magnetic nanoparticles are of interest because of potential application in lightweight high-bandwidth microwave absorbing materials.


  • Hackett scholarship


Department of Physics

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Monday, 2 August, 2010 2:54 PM