Magnetic measurements in thin film specimens: Rejecting the contribution of the substrate

Manios, E.; Σταμόπουλος, Δ.; Moutis, N.; Pissas, M.; Niarchos, D.

doi:10.1016/j.jmmm.2008.06.020

Cited by 3 publications

(2 citation statements)

References 43 publications

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“…where M and S are the magnetization and area of the sample, respectively, M Si and S Si are the magnetization and area of the pure Si substrate after cleaning chemically and M F is the magnetization of the film. Recently, Manios et al [29] have presented a reliable method that can be employed to directly reject the magnetic signal originating from the substrate. This is worthy of application to the cases where the deposited films have a low saturation magnetization (M S ) and a coercivity field, such as DMSs.…”

Section: Resultsmentioning

confidence: 99%

Intrinsic and extrinsic origins of room temperature ferromagnetism in Ni-doped ZnO films

Liu¹,

Zhu²,

Song³

et al. 2009

J. Phys. D: Appl. Phys.

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The structural, electrical and magnetic properties of Ni-doped ZnO films with different Ni concentrations (x = 0–0.11, x: Ni concentration) and thicknesses (d = 15–330 nm, d: film thickness) prepared by radio-frequency magnetron sputtering have been systematically investigated. The structural characterizations indicate that Ni ions in the 2+ valence state, uniformly distributed in the film, almost substitute for the Zn ions when x ⩽ 0.07, whereas when x increases up to 0.11, a second phase Ni is formed. Room temperature (RT) ferromagnetism (FM) has been observed for all the Ni-doped ZnO wurtzite films. The saturated magnetization varies drastically with the Ni concentration and the film thickness. A large magnetic moment of 2.80 μB/Ni is obtained in the 15 nm thick Zn0.96Ni0.04O film at RT. The results show that the FM observed is intrinsic for Ni-doped ZnO films and can be explained in terms of the bound magnetic polaron mechanism based on the presence of defects. In addition, the Ni precipitates owing to the excessive doping of Ni in ZnO, as an extrinsic origin, also contribute to the ferromagnetic properties in highly doped samples.

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Section: Resultsmentioning

confidence: 99%

Intrinsic and extrinsic origins of room temperature ferromagnetism in Ni-doped ZnO films

Liu¹,

Zhu²,

Song³

et al. 2009

J. Phys. D: Appl. Phys.

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show abstract

“…An appropriate tube length was chosen to ensure that the tube extended well beyond the SQUID pick up coils during the measurement scan. In this way it was guaranteed that the tubes do not contribute to the measured magnetic moment, similar as described for long homogenous substrates by Manios et al [26].…”

Section: Methodsmentioning

confidence: 52%

Charging of lithium cobalt oxide battery cathodes studied by means of magnetometry

et al. 2016

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Electrochemical cell for in situ electrodeposition of magnetic thin films in a superconducting quantum interference device magnetometer

Topolovec

Krenn

Würschum

2015

Review of Scientific Instruments

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An electrochemical cell is designed and applied for in situ electrodeposition of magnetic thin films in a commercial SQUID magnetometer system. The cell is constructed in such a way that any parasitic contribution of the cell and of the substrate for electrodeposition to the magnetic moment of the deposited film is reduced to a minimum. A remanent minor contribution is readily taken into account by a proper analysis of the detected signal. Thus, a precise determination of the absolute magnetic moment of the electrodeposited magnetic film during its growth and dissolution is achieved. The feasibility of the cell design is demonstrated by performing Co electrodeposition using cyclic voltammetry. For an average Co film thickness of (35.6 ± 3.0) atomic layers, a magnetic moment per Co atom of (1.75 ± 0.11) μ(B) was estimated, in good agreement with the literature bulk value.

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Magnetic measurements in thin film specimens: Rejecting the contribution of the substrate

Cited by 3 publications

References 43 publications

Intrinsic and extrinsic origins of room temperature ferromagnetism in Ni-doped ZnO films

Intrinsic and extrinsic origins of room temperature ferromagnetism in Ni-doped ZnO films

Charging of lithium cobalt oxide battery cathodes studied by means of magnetometry

Electrochemical cell for in situ electrodeposition of magnetic thin films in a superconducting quantum interference device magnetometer

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