2010
DOI: 10.1063/1.3486044
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Ferromagnetic properties of the Mn-doped nanograined ZnO films

Abstract: Dense nanograined pure and Mn-doped Zn1−xMnxO polycrystals with x ranging between 0.1–34 at. % were synthesized by the wet chemistry method from butanoate precursors. Pure and Mn-doped ZnO possesses ferromagnetic properties only if the ratio of grain boundary (GB) area to grain volume sGB exceeds a certain threshold value sth. The polycrystals in this work satisfy these conditions and, therefore, reveal ferromagnetic properties. The observed dependence of saturation magnetization on the Mn concentration shows … Show more

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Cited by 111 publications
(83 citation statements)
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“…2 and 3 that the magnitude of RT FM response relates to a large density of lattice defects (vacancies) at the interface region, as observed recently [8,9]. Firstly, deep defects concentration is very low in our ALD films grown at 4 Origin of RT FM in ZnCoO films grown at low temperature by ALD Several mechanisms were proposed to account for the RT FR of ZnCoO.…”
mentioning
confidence: 72%
See 1 more Smart Citation
“…2 and 3 that the magnitude of RT FM response relates to a large density of lattice defects (vacancies) at the interface region, as observed recently [8,9]. Firstly, deep defects concentration is very low in our ALD films grown at 4 Origin of RT FM in ZnCoO films grown at low temperature by ALD Several mechanisms were proposed to account for the RT FR of ZnCoO.…”
mentioning
confidence: 72%
“…Further details on growth conditions can be found in Ref. [8]. Uniformity of ZnCoO samples was assessed by the secondary ion mass spectroscopy (SIMS, see Fig.…”
mentioning
confidence: 99%
“…It is noted that oxide phase was not detected by X-ray diffraction either in the initial powder or in the consolidated specimens which can be explained by its small fraction (0.2-1% as calculated from the particle size and the oxide layer thickness) and/or its amorphous state. Additionally, the observation of this oxide phase is more difficult if it does not form dispersoids during sintering but rather remains in the form of a thin grain boundary layer, similar to carbides in steel after HPT [36] or MnO in Mn-doped nanograined ZnO [37].…”
Section: Resultsmentioning
confidence: 99%
“…Although there are many experimental studies on magnetic and non-magnetic doped ZnO films showing room temperature ferromagnetism, the origin of ferromagnetism is still strongly debated in transition metal (TM)-doped oxide DMSs such as ZnO-based DMS [16][17][18]. Early studies proposed that a free carrier mediated mechanism was responsible for the ferromagnetic behavior [19].…”
Section: Introductionmentioning
confidence: 99%