X-Ray diffraction, electronic structure and magnetic characterization of nano and single crystals SrLaAlO4: Mn optical materials

Talik, E.; Pajączkowska, A.; Guzik, A.; Zajdel, P.; Kusz, Joachim; Kłos, A.; Szysiak, A.

doi:10.1016/j.mseb.2013.11.028

Cited by 12 publications

(6 citation statements)

References 12 publications

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“…The eventual inaccuracy in the film thickness determination and, importantly, certain paramagnetic contamination of Ir in the SLAO substrate that are of the Curie-type temperature dependence and interfere thus with diamagnetism of the films, further complicates the quantitative analysis. 43 Nonetheless, in spite of these limitations, we would like to note that the ZFC/FC susceptibility curves observed for PYCCO/SLAO film remind the Curie-type behavior of the PrY15 bulk, although a reduction of magnetic susceptibility cannot be observed, which may come from the diffuse character of MI transition. However, the narrow hysteresis loop at 2 K is of a similar curvature and magnitude as found in the PrY15 bulk with similar chemical composition undergoing the MI transition.…”

Section: Magnetization Of Pycco Films On Slao and Lao Substratesmentioning

confidence: 88%

Electrical resistivity anomaly, valence shift of Pr ion, and magnetic behavior in epitaxial (Pr1-yYy)1-xCaxCoO3 thin films under compressive strain

Fujishiro

Noda

Akuzawa

et al. 2017

Journal of Applied Physics

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We have fabricated (Pr 1Ày Y y) 1-x Ca x CoO 3 (PYCCO) epitaxial films with various thicknesses by pulsed laser deposition on the SrLaAlO 4 (SLAO) substrate that applied an in-plane compressive stress to the film, and investigated the temperature dependence of the electrical resistivity, q(T), of the films. An anomalous q(T) upturn with a broad hysteresis could be clearly observed only for the thinnest film (d ¼ 50 nm), and the q(T) anomaly decreased by increasing film thickness, d. The temperature dependence of the X-ray absorption near-edge structure (XANES) spectra at Pr L 2-edge was measured for the films, and the valence states of praseodymium (Pr) ion were determined using the analysis of the XANES spectra. As a result, the average valence of the Pr ion in the d ¼ 50 nm film slightly increases with decreasing temperature from the common value of 3.0þ around room temperature to 3.15þ at 8 K. The valence shift of Pr is thus similar to what was observed on the PYCCO polycrystalline bulks with an abrupt metal-insulator transition, accompanied by a spinstate (SS) transition of Co ions. Furthermore, the low-temperature SQUID measurements evidenced a paramagnetic behavior down to the lowest temperature, which suggests that the dominant part of Co 3þ ions in the film grown on the SLAO substrate tends to be in the low spin state characteristic for the insulating ground state. These results strongly suggest that the anomalous q(T) upturn in the thin films on the SrLaAlO 4 (SLAO) substrate is closely related to the SS transition of Co ions. On the other hand, PYCCO films grown on the LaAlO 3 (LAO) substrate that applied an in-plane tensile stress showed no valence shift of Pr ions and developed a long range ferromagnetic order, which points to a complete suppression of the low-temperature transition. The behaviors of the epitaxial films are discussed in terms of the in-plane stress exerted by different substrates and accumulated elastic energy.

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Section: Magnetization Of Pycco Films On Slao and Lao Substratesmentioning

confidence: 88%

Electrical resistivity anomaly, valence shift of Pr ion, and magnetic behavior in epitaxial (Pr1-yYy)1-xCaxCoO3 thin films under compressive strain

Fujishiro

Noda

Akuzawa

et al. 2017

Journal of Applied Physics

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“…Optical spectroscopy study of Zhydachevskii et al 12 shows that manganese ion is present exclusively in doped SrLaAlO 4 crystal tetragonal lattice in the form of M n 4+ ion occupying six fold coordinated Al 3+ sites. Hence the presence of M n 4+ ion in lower valence Al 3+ site is enhanced 13 . Also, the higher valence state of M n 4+ ion resulting in stronger Coulomb interaction between M n 4+ ion and O 2− ion 12,13 .…”

Section: Resultsmentioning

confidence: 98%

“…Hence the presence of M n 4+ ion in lower valence Al 3+ site is enhanced 13 . Also, the higher valence state of M n 4+ ion resulting in stronger Coulomb interaction between M n 4+ ion and O 2− ion 12,13 . The fact that in the 4 T 2g triplet, M n 4+ ion has energy level overlapping depending on local charge density 12,13 .…”

Section: Resultsmentioning

confidence: 98%

“…Also, the higher valence state of M n 4+ ion resulting in stronger Coulomb interaction between M n 4+ ion and O 2− ion 12,13 . The fact that in the 4 T 2g triplet, M n 4+ ion has energy level overlapping depending on local charge density 12,13 . This overlapping in the perovskite crystal SLA structure display variety of magnetic properties as a linear combinations of the atomic Hartree-Fock orbitals 14,15,42,43 in the molecular orbitals (MO) of M nO 6 complex 15,16 .…”

Section: Resultsmentioning

confidence: 99%

“…Such a transition process can be used to monitor magnetization saturation (M s ), Curie temperature (T c ), coercive (magnetic) field (H c ) and/or the magnetic pole 11 . Optical spectroscopy and X-ray diffraction (XRD) results are available providing localization information of M n 4+ ion in this type of crystal 12,13 .…”

Section: A Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ultrasensitive multi-mode ESR probed ferromagnetic two-level system of $Mn^{4+}$ impurity ion in the insulated $MnO_6$ complex of $SrLaAlO_4$ at $20~mK$

Hosain

2018

Preprint

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Electronic and crystal structure, EPR and magnetic investigations of YF3:1%RE (RE = Pr, Ho, Er and Tm) and LaF3:1%Pr nanocrystals

Talik

Zajdel

Guzik

et al. 2014

Journal of Alloys and Compounds

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X-Ray diffraction, electronic structure and magnetic characterization of nano and single crystals SrLaAlO4: Mn optical materials

Cited by 12 publications

References 12 publications

Electrical resistivity anomaly, valence shift of Pr ion, and magnetic behavior in epitaxial (Pr1-yYy)1-xCaxCoO3 thin films under compressive strain

Electrical resistivity anomaly, valence shift of Pr ion, and magnetic behavior in epitaxial (Pr1-yYy)1-xCaxCoO3 thin films under compressive strain

Ultrasensitive multi-mode ESR probed ferromagnetic two-level system of $Mn^{4+}$ impurity ion in the insulated $MnO_6$ complex of $SrLaAlO_4$ at $20~mK$

Electronic and crystal structure, EPR and magnetic investigations of YF3:1%RE (RE = Pr, Ho, Er and Tm) and LaF3:1%Pr nanocrystals

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