TRIUMF Canada's National Laboratory for Particle and Nuclear Physics STUDENT JOB PROGRAM Spring 2019 job posting Job number TR19-1-2 | ||
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Position Title:Development of Magnetic Resonance Spectrometer for Spintronics Applications | ||
Name of Project:Broadband Radiofrequency Techniques for Investigations of Magnetic Thin Films | ||
Overview:The field of spintronics aims to combine the data storage capabilities of magnetic media with the data processing capabilities of the semiconductor industry. As such, the controlled manipulation of a nonequilibrium spin population is required. Data storage relies on orienting the magnetisation of a magnetic bit, while devices making use of giant magnetoresistance (like the magnetic read heads of hard drives) or spin transfer torque effects are based on spin polarised electron currents. Recently, attention has turned to developing ideas and systems based on pure spin currents without any associated charge current.Generating a spin current (in the absence of a charge current) through spin pumping relies on the precession of the magnetisation induced in a ferromagnet excited by a radiofrequency magnetic field on resonance (FMR). The magnetisation precession is damped via the emission of a polarised spin current into the neighbouring normal metal, which is typically measured as an increase in the FMR linewidth. The goal is to investigate how the magnetic anisotropy and spin pumping efficiency varies with temperature and magnetic field. A bespoke broadband air stripline is being developed, such that in-situ FMR may be combined with 8Li beta detected NMR at TRIUMF. Initially the investigation will focus on artificial heterostructures based on (Y3Fe5O12) / simple metals. Y3Fe5O12 has very low magnetic losses, such that a large number of low loss magnons may be generated and hence an appreciable pure spin current. | ||
Duties:The project will involve the design of a experimental rig for applying radiofrequency (RF) magnetic fields to a sample of interest. The sample environment will encompass magnetic fields up to 1 Tesla over a temperature range between 2-300 K. Once constructed, the magnetic response of magnetic films of relevance to spin pumping applications will be investigated. | ||
Skills learned during this work experience:The successful candidate will gain a background in mechanical design, cryogenics, radiofrequency techniques and instrumentation. They will also be introduced to the use of ferromagnetic resonance techniques for characterisation of magnetic heterostructures. | ||
Qualifications:A third or fourth year undergraduate student in physics or engineering is sought. An aptitude and interest in the design and mechanical assembly of a cryostat insert, electromagnet and ferromagnetic resonance probe is required. | ||
Shiftwork required:No | ||
Period of work:Jan - Apr 2019 with possible 4-month extension | ||
Salary is commensurate with academic progress and previous relevant work experience, and
ranges from $ 2080 to $ 2800 per month plus 4% vacation pay. TRIUMF pays round-trip airfare (this does not apply to Vancouver/Victoria students); for Vancouver Island students, TRIUMF will pay ferry costs.
TRIUMF is an equal opportunity employer committed to diversity in the workplace, and we
welcome applications from all qualified undergraduate students as defined below:
Applications must be received at TRIUMF by 4:00pm Pacific time on 2018-09-24. To apply for any of the job postings, you must submit one application for each and every job for which you wish to be considered. Please combine all documents into one PDF for each job. All applications can be attached to one email in PDF format. Please do not send electronic documents in formats other than PDF. Please save the PDF as lastname-job number (eg Smith-15.pdf)
Students within an university co-op program MUST apply for TRIUMF jobs through their university co-op education office.
No phone calls please. TRIUMF wishes to thank all applicants for their interest, and regrets that only those being considered will be contacted.
For more information, visit our web site http://www.triumf.ca |