title: Proximal magnetometry in thin films using betaNMR.
abstract: Low energy ion implantation of hyperpolarized radioactive magnetic resonance probes allows the NMR study of thin film heterostructures by enabling depth-resolved measurements on a nanometer lengthscale. By stopping the probe ions in a layer adjacent to a layer of interest, it is possible to study magnetic fields proximally. Here we show that, in the simplest case of a uniformly magnetized layer, this yields an unperturbed in situ frequency reference. We also discuss demagnetization contributions to measured shifts for this case. With a simple illustrative calculation, we show how a nonuniformly magnetized layer causes a strongly depth-dependent line broadening in an adjacent layer. We then give some experimental examples of resonance line broadening in heterostructures.
authors.affiliation: TRIUMF, 4004 Wesbrook Mall, Vancouver, Canada V6T 2A3.
authors.forename: M
authors.initials: M
authors.lastname: Xu
authors.forename: M D
authors.initials: MD
authors.lastname: Hossain
authors.forename: H
authors.initials: H
authors.lastname: Saadaoui
authors.forename: T J
authors.initials: TJ
authors.lastname: Parolin
authors.forename: K H
authors.initials: KH
authors.lastname: Chow
authors.forename: T A
authors.initials: TA
authors.lastname: Keeler
authors.forename: R F
authors.initials: RF
authors.lastname: Kiefl
authors.forename: G D
authors.initials: GD
authors.lastname: Morris
authors.forename: Z
authors.initials: Z
authors.lastname: Salman
authors.forename: Q
authors.initials: Q
authors.lastname: Song
authors.forename: D
authors.initials: D
authors.lastname: Wang
authors.forename: W A
authors.initials: WA
authors.lastname: MacFarlane
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008280:Magnetics; D008567:Membranes, Artificial; D008956:Models, Chemical; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*
chemical_list: D008567:Membranes, Artificial