Diffuse neutron scattering of iron-doped nickel oxide

Hoser, A.; Martin, Manfred; Schweika, W.; Carlsson, Anders; Caudron, R.; Pyka, N.

doi:10.1016/0167-2738(94)90127-9

Cited by 11 publications

(4 citation statements)

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“…In this case a Fe 3+ ion occupying interstitial site is coordinated to 4 Ni vacancies. Such a defect structure in Fe doped NiO was predicated by theoretical studies [17] and indicated by neutron scattering experiments [21]. Similar is the situation with Mn and Co doping, where the defect structure in MnO and CoO is expected to be reflected in the structure of NiO if doped by Mn or Co.…”

Section: Evolution Of Structure and Microstructure Of Nio With Transisupporting

confidence: 57%

Evolution of Structure, Microstructure, Electrical and Magnetic Properties of Nickel Oxide (NiO) with Transition Metal ion Doping

Mallick¹,

Mishra²

2012

MATERIALS

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We present a brief review on the evolution of structure, microstructure, electrical and magnetic properties of NiO with transition metal (TM) doping. The fcc structure of NiO is not affected with TM doping whereas the some of the TM ion influences the microstructure. The antiferromagnetic property of NiO is strongly modified with some of the TM (Fe, Mn, V) doping and the same is not much affected with some other TM (Co, Cr, Zn and Cu) doping. Not only the dopants but also the form of the material decides the magnetic order in the host matrix. Powder NiO exhibits room temperature ferromagnetism with Fe doping, superparamagnetism with Mn doping. NiO thin films on the other hand exhibit ferromagnetism with Fe, Mn and V doping. The ferromagnetic ordering in these cases was improved with Li co-doping. The increased ferromagnetism in these cases may be due to increase of hole concentration due to Li doping. Giant dielectric response has been observed for (Li, Fe) and (Li, V) doped NiO ceramics.

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Section: Evolution Of Structure and Microstructure Of Nio With Transisupporting

confidence: 57%

Evolution of Structure, Microstructure, Electrical and Magnetic Properties of Nickel Oxide (NiO) with Transition Metal ion Doping

Mallick¹,

Mishra²

2012

MATERIALS

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“…In a study of iron doped NiO, which also has been studied by diffuse scattering experiments, the case of a "dilute wustite" seems to be realized. Observations are very similar to pure Fe,-10 particularly showing that Fe interstitials are surrounded by cation vacancies [6].…”

mentioning

confidence: 73%

Neutron scattering studies of the structural and dynamical properties of disordered oxides

1997

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“…In a similar way, ∼15 nm size Mn-doped NiO NPs have shown FM properties, 21–28 nm shows SPM/AF properties, and 50 nm becomes PM . The above discrepancies in the magnetic properties have been attributed to the contribution from the magnetization resulting from (i) the finite size resulting in enhanced surface effect, (ii) the segregation of secondary TM-related impurity phases, (iii) double exchange interactions through substitutional TM ions at octahedral Ni site and charge carriers from defects, (iv) interstitially doped TM ions at tetrahedral site resulting in the formation of 4:1 defect cluster, ,,− and (v) intraparticle interactions . Apart from above, the reported discrepancies in the magnetic properties could also be a consequence of a lack of a standard methodology for defining the RT magnetic properties, since simply having a nonzero value of coercivity and remanence at RT could possibly originate from spurious phases and point defects or could be related to SPM properties that may have a Curie temperature below RT.…”

Section: Introductionmentioning

confidence: 86%

Understanding the Magnetic Memory Effect in Fe-Doped NiO Nanoparticles for the Development of Spintronic Devices

Gandhi

Pradeep

Yeh

et al. 2018

ACS Appl. Nano Mater.

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Uniform hexagonal single phase Ni1–x Fe x O (x = 0, 0.01, 0.05, and 0.1) nanoparticles synthesized by a standard hydrothermal method are characterized with an enhanced lattice expansion along with a decrease in the microstrain, crystal size, and Ni occupancy as a function of the Fe concentration. The observed anomalous temperature and field dependent magnetic properties as a function of the Fe content were explained using a core–shell type structure of Ni1–x Fe x O nanoparticle such that the effect of Fe-doping has led to a decrease of disordered surface spins and an increase of uncompensated-core spins. Perfect incorporation of Fe3+ ions at the octahedral site of NiO was observed from the low Fe concentration; however, at a higher Fe content, 4:1 defect clusters (four octahedral Ni2+ vacancies surrounding an Fe3+ tetrahedral interstitial) are formed in the core of the nanoparticles, resulting in the transition of spin-glassy to the cluster-glassy system. An enhanced thermal magnetic memory effect is noted from the cluster-glassy system possibly because of increased intraparticle interactions. The outcome of this study is important for the future development of diluted magnetic semiconductor spintronic devices and the understanding of their fundamental physics.

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Diffuse neutron scattering of iron-doped nickel oxide

Cited by 11 publications

References 5 publications

Evolution of Structure, Microstructure, Electrical and Magnetic Properties of Nickel Oxide (NiO) with Transition Metal ion Doping

Evolution of Structure, Microstructure, Electrical and Magnetic Properties of Nickel Oxide (NiO) with Transition Metal ion Doping

Neutron scattering studies of the structural and dynamical properties of disordered oxides

Understanding the Magnetic Memory Effect in Fe-Doped NiO Nanoparticles for the Development of Spintronic Devices

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