Effect of thickness and Si substrate morphology in La0.7Sr0.3MnO3/Si thin films

Investigation has been made on atomic, electronic structures and magnetic properties of La0.7Sr0.3MnO3 (LSMO) on Si substrate. The effect of different thickness of LSMO and different morphological [flat and nano-pyramid (NP)] of Si substrate are studied in present work. The result of Mn K-edge extended x-ray absorption fine structure indicates the more disorder of local atomic structure of first shell (Mn-O bound) in the thinner LSMO/Si film. The Mn L3,2-edge x-ray absorption near-edge structure shows the presence of Mn2+ ion on the sample. Furthermore, the Mn L3,2-edge x-ray magnetic circular dichroism reveals that the thinner film (LSMO/Si) has highest magnetic moment, in comparison to that of thick LSMO/Si and LSMO/Si-NP samples. This finding suggests that the appearance Mn2+ may play an important role in magnetic behavior of hetero-junction LSMnO/Si and Si-NP.

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The electronic and magnetic properties of strained La0.85Zr0.15MnO3films

Acta Crystallographica Section A Foundations and Advances ◽

10.1107/s2053273314097745 ◽

2014 ◽

Vol 70 (a1) ◽

pp. C225-C225

Author(s):

N. G. Deshpande ◽

C. H. Weng ◽

Y. F. Wang ◽

Y. C. Shao ◽

D. C. Ling ◽

...

Keyword(s):

Thin Films ◽

Magnetic Properties ◽

Magnetic Circular Dichroism ◽

Magnetic Transition ◽

Linear Dichroism ◽

Orbital Ordering ◽

Magnetic Transition Temperature ◽

Edge Structure ◽

X Ray ◽

Electronic And Magnetic Properties

The electronic and magnetic properties of strained tetravalent-ion-doped La0.85Zr0.15MnO3 (LZMO) thin films that were epitaxially grown on SrTiO3 (STO) and MgO substrates were studied using temperature-dependent x-ray diffraction (XRD), x-ray absorption near-edge structure (XANES), x-ray linear dichroism (XLD) and x-ray magnetic circular dichroism (XMCD) at the Mn L3,2- and K-edge. XRD studies reveal that the LZMO thin films have compressive and tensile strains on the STO and MgO substrates, respectively. As temperature is reduced from room temperature to below magnetic transition temperature, the preferentially occupied Mn majority-spin eg orbital changes from the in-plane dx2-y2 to the out-of-plane d3z2-r2 orbital for LZMO/STO, and vice versa for LZMO/MgO. Experimental results suggest that the new hopping path that is mediated by the Mn2+ ions triggers a stronger d3z2-r2 orbital ordering of Mn3+ ions and enhances the ferromagnetic coupling between the Mn spin moments of t2g electrons in LZMO/STO, whereas the tensile strain stabilizes the dx2-y2 orbital by inducing lattice distortions of the MnO6 octahedra in LZMO/MgO.

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Variation of electronic structures of CeAl2 thin films with thickness studied by X-ray absorption near-edge structure spectroscopy

Journal of Electron Spectroscopy and Related Phenomena ◽

10.1016/j.elspec.2006.01.004 ◽

2006 ◽

Vol 152 (1-2) ◽

pp. 1-5 ◽

Cited By ~ 2

Author(s):

C.L. Dong ◽

K. Asokan ◽

C.L. Chang ◽

C.L. Chen ◽

P.C. Lee ◽

...

Keyword(s):

Thin Films ◽

Electronic Structures ◽

Edge Structure ◽

X Ray ◽

X Ray Absorption

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Magnetic Circular Dichroism And X-Ray Absorption Near Edge Structure Studies Of Magnetoresistive Oxides

MRS Proceedings ◽

10.1557/proc-437-85 ◽

1996 ◽

Vol 437 ◽

Cited By ~ 1

Author(s):

S. M. Mini ◽

John Mitchell ◽

D. G. Hinks ◽

C. W. Kimball ◽

P. A. Montano ◽

...

Keyword(s):

Magnetic Properties ◽

Circular Dichroism ◽

Magnetic Circular Dichroism ◽

Oxide Systems ◽

Edge Structure ◽

X Ray ◽

Mn Oxide ◽

X Ray Absorption ◽

Circular Dichroïsm ◽

Electronic And Structural Properties

AbstractWe report the results of temperature dependent, Mn K-edge X-ray Absorption measurements: Magnetic X-ray Circular Dichroism (MXCD) for local magnetic properties and X-ray Absorption Near Edge (XANES) for electronic and structural properties of Mn-based oxide magnetoresistive compounds La1−xSrxMnO3. This is the first report of an MXCD signal of the Mn K-edge in Mn oxide systems. By studying the integrated peak intensity of the first peak in the MXCD signal, it can be determined that the magnetic properties of the system are independent of temperature in the range 94 to 223K.

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X-ray absorption near-edge structure spectroscopy research on electronic structures and magnetic properties of (Fe1-xNix)2P

Acta Physica Sinica ◽

10.7498/aps.57.3868 ◽

2008 ◽

Vol 57 (6) ◽

pp. 3868

Author(s):

Ma Chen-Yan ◽

Cui Ming-Qi ◽

Zhang Ling-Yun ◽

Wu Xiang ◽

Zhou Ke-Jin ◽

...

Keyword(s):

Magnetic Properties ◽

Electronic Structures ◽

Edge Structure ◽

X Ray ◽

X Ray Absorption ◽

Spectroscopy Research

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A contrast in the electronic structures of B ion implanted ZnO thin films grown on glass and silicon substrates by using x-ray absorption spectroscopy

Journal of Applied Physics ◽

10.1063/5.0007733 ◽

2020 ◽

Vol 128 (6) ◽

pp. 065303

Author(s):

Krishna Kumar ◽

Shi-Chen Wu ◽

Yueh-Chung Yu ◽

Da-Hua Wei ◽

Jau-Wern Chiou

Keyword(s):

Thin Films ◽

Absorption Spectroscopy ◽

Electronic Structures ◽

Zno Thin Films ◽

Silicon Substrates ◽

X Ray ◽

X Ray Absorption ◽

Ion Implanted

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Al-driven peculiarities of local coordination and magnetic properties in single-phase Alx-CrFeCoNi high-entropy alloys

Nano Research ◽

10.1007/s12274-021-3704-5 ◽

2021 ◽

Author(s):

Alevtina Smekhova ◽

Alexei Kuzmin ◽

Konrad Siemensmeyer ◽

Chen Luo ◽

Kai Chen ◽

...

Keyword(s):

Magnetic Properties ◽

Single Phase ◽

Magnetic Circular Dichroism ◽

Surface Region ◽

Face Centered Cubic ◽

X Rays ◽

X Ray ◽

High Entropy ◽

X Ray Absorption ◽

Absorption Edges

AbstractModern design of superior multi-functional alloys composed of several principal components requires in-depth studies of their local structure for developing desired macroscopic properties. Herein, peculiarities of atomic arrangements on the local scale and electronic states of constituent elements in the single-phase face-centered cubic (fcc)- and body-centered cubic (bcc)-structured high-entropy Alx-CrFeCoNi alloys (x = 0.3 and 3, respectively) are explored by element-specific X-ray absorption spectroscopy in hard and soft X-ray energy ranges. Simulations based on the reverse Monte Carlo approach allow to perform a simultaneous fit of extended X-ray absorption fine structure spectra recorded at K absorption edges of each 3d constituent and to reconstruct the local environment within the first coordination shells of absorbers with high precision. The revealed unimodal and bimodal distributions of all five elements are in agreement with structure-dependent magnetic properties of studied alloys probed by magnetometry. A degree of surface atoms oxidation uncovered by soft X-rays suggests different kinetics of oxide formation for each type of constituents and has to be taken into account. X-ray magnetic circular dichroism technique employed at L2.3 absorption edges of transition metals demonstrates reduced magnetic moments of 3d metal constituents in the sub-surface region of in situ cleaned fcc-structured Al0.3-CrFeCoNi compared to their bulk values. Extended to nanostructured versions of multicomponent alloys, such studies would bring new insights related to effects of high entropy mixing on low dimensions.

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