Magnetism in iron implanted oxides: a status report

Gunnlaugsson, H. P.; Sielemann, R.; Mølholt, T. E.; Dlamini, W. B.; Johnston, K.; Mantovan, R.; Masenda, H.; Naidoo, D.; Sibanda, W. N.; Bharuth-Ram, K.; Fanciulli, M.; Gíslason, H. P.; Langouche, Guido; Ólafsson, S.; Weyer, G.

doi:10.1007/s10751-010-0195-2

Cited by 7 publications

(1 citation statement)

References 13 publications

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“…While the build-up of Fe 3+ in ZnO is related to the implantation process, the relaxation properties of the long-lived paramagnetic state do not appear to depend on the fluence. Any variation in the spin-lattice relaxation rates should lead to changes in the shapes and line-widths of the MS sextets [14,29,31]. This is not observed within the spectral resolution of the experiment.…”

Section: Resultsmentioning

confidence: 89%

Fe charge state adjustment in ZnO upon ion implantation

Mantovan¹,

Gunnlaugsson

Naidoo

et al. 2012

J. Phys.: Condens. Matter

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The influence of the ion implantation process on the charge state of dilute (57)Fe impurities implanted as radioactive (57)Mn in ZnO is investigated by (57)Fe emission Mössbauer spectroscopy. One sample is additionally implanted with stable (23)Na impurities. Both Fe(2+) and Fe(3+) charge states are observed, and the Fe(3+)/Fe(2+) ratio is found to increase with the fluence of both (57)Mn/(57)Fe and (23)Na ions, demonstrating that the build-up of Fe(3+) is not related to the chemical nature of the implanted ions. The results are interpreted in terms of radiation damage induced changes of the Fermi level, and illustrate that the Fe(3+)/Fe(2+) ratio can be adjusted by ion implantation. The spin-lattice relaxation time for Fe(3+) in ZnO is found to be independent of the implantation fluence, and is evidently an intrinsic property of the system.

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Section: Resultsmentioning

confidence: 89%