Anomalies of Hall Effect and Magnetoresistance in Oxygen Deficient La2/3A1/3MnO3—δ Epitaxial Layers

Mandal, P.; Poddar, A.; Jansen, A. G. M.; Bärner, K.; Haupt, L.; Helmolt, R. von

doi:10.1002/(sici)1521-396x(199801)165:1<219::aid-pssa219>3.0.co;2-u

Cited by 11 publications

(3 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7b we assume T mi < T 1 and dT mi /dH < 0. 6b, where another La 0.67 Ca 0.33 MnO 3Àd 2 oxygen deficient sample [18] with a lower magnetization indeed shows a positive magnetoresistance and its crossover. The first example is choosen to compare with Fig.…”

Section: Magnetoresistancementioning

confidence: 92%

Positive and Negative Magnetoresistance in Mixed Superexchange–Double Exchange Systems

Bärner

Mandal

Helmolt

2001

phys. stat. sol. (b)

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Magnetoresistancementioning

confidence: 92%

Positive and Negative Magnetoresistance in Mixed Superexchange–Double Exchange Systems

Bärner

Mandal

Helmolt

2001

phys. stat. sol. (b)

Self Cite

View full text Add to dashboard Cite

show abstract

“…The observed features are analogous to other manganite systems having AFM ground state. 35,36 Mean field theories predicts that PMR in AFM state can arises in metal when the applied field is parallel to sub-lattice magnetization and it is quadratic in nature whereas, for ferromagnetic and paramagnetic cases, the magnetic field increases the effective field acting on localized spins and suppresses the thermodynamic fluctuation of the spins and produced NMR, which shows a linear field dependence. Usually, in polycrystalline AFM metal, MR changes from positive and then drops down to zero and finally turns to the negative with the increase of magnetic fields, the boundary of each region is being rounded by domain wall motion and polycrystalline effects due to the application of external magnetic fields.…”

Section: Magnetoresistance Propertiesmentioning

confidence: 99%

Emergence of ferromagnetism and metallicity in Pr0.5Sr0.5MnO3 nanoparticles

et al. 2018

View full text Add to dashboard Cite

ARTICLES YOU MAY BE INTERESTED INSurface spin glass and exchange bias effect in Sm 0.5 Ca 0.5 MnO 3 manganites nano particles AIP Advances 1, 032110 (2011); https://doi.org/10.1063/1.3623428The effect of inserted layers on the anomalous Hall effect and perpendicular magnetic anisotropy in Ta In this paper, we have studied low-temperature magnetic properties and transport dynamics of half-doped Pr 0.5 Sr 0.5 MnO 3 (PSMO) nano-manganite. Nanoparticles with different average grain sizes are synthesized using chemical pyrophoric reaction route and exhibit same crystal structure. It is reported that particle size reduction in half-doped PSMO manganite interestingly leads to ferromagnetic (FM) metallic behavior which is accompanied by coupled positive magnetoresistance (PMR) (up to 9%) at fields (H ≤ 1kOe at 50K) and negative magnetoresistance (NMR) (∼59% at 100K) at 80kOe fields. Interestingly, maximum PMR is appeared at much lower than the critical field (30kOe) for the melting of insulating -antiferromagnetic (AFM) ordered state. Moreover, it is found that low-temperature AFM-FM phase transition, T N ∼ 135K is smeared out with reduction of particle size; however, the transition is prominent in bulk material. A metastable magnetic state with a mixed fraction of FM and AFM phases is observed below T N . Superparamagnetic (SPM) behavior of PSMO nanoparticles has been revealed by probing ac-susceptibility measurements. Lowtemperature transport dynamics has been investigated through four probe resistivity and magneto-transport measurements. A size-induced insulating-metallic phase transition is observed on nano dimension in the range of 125-155K under high magnetic fields; however, the bulk counterpart remains insulating over the entire temperature range. The non-trivial electronic-and magnetotransport properties are explained by the inter-grain spin-polarized hopping mechanism through double exchange (DE) interactions. These issues have been revisited and discussed in the framework of enhanced surface disorder, where surface spins plays the crucial role for inter-grain transport dynamics in nanometric dimension. We believe the present field dependent MR holds excellent potential for future spintronic devices and manifests the exotic properties of strongly correlated materials. © 2018 Author(s)

show abstract

“…In Ref. [12] it is shown that there are parallels of the two different cases to the intrinsic negative (positive) magnetoresistance [24]. …”

Section: Article In Pressmentioning

confidence: 99%

Pressure dependence of the MI-transition temperature under competing double exchange–superexchange interactions close to CDO afm insulating states

Bärner

Медведева

Zavadskii

2005

Physica B: Condensed Matter

Self Cite

View full text Add to dashboard Cite

Anomalies of Hall Effect and Magnetoresistance in Oxygen Deficient La2/3A1/3MnO3—δ Epitaxial Layers

Cited by 11 publications

References 39 publications

Positive and Negative Magnetoresistance in Mixed Superexchange–Double Exchange Systems

Positive and Negative Magnetoresistance in Mixed Superexchange–Double Exchange Systems

Emergence of ferromagnetism and metallicity in Pr0.5Sr0.5MnO3 nanoparticles

Pressure dependence of the MI-transition temperature under competing double exchange–superexchange interactions close to CDO afm insulating states

Contact Info

Product

Resources

About