Impurity induced Raman spectra in MgO+Fe<sup>3+</sup>and in MgO+Cr<sup>3+</sup>crystals

Billat, A.; Mon, J. P.; Voisin, M.

doi:10.1088/0022-3719/9/7/026

Search citation statements

Order By: Relevance

Paper Sections

Select...

Analysis Of Microscopic Crystal Field Effects1

Introduction1

Citation Types

Supporting

Mentioning

Contrasting

Year Published

1980

2023

Publication Types

Select...

Article6

Relationship

Self Cite0

Independent6

Authors

Journals

Cited by 6 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To calculate them, we used the CRYSTAL 09 package [25,26], and obtained the values hx a1g ¼ 641 cm À1 and hx eg ¼ 391 cm À1 . The values of these frequencies are comparable with values ( hx a1g ¼ 650 cm À1 , hx eg ¼ 480 cm À1 ) for MgO:Cr 2+ system [34], ( hx a1g ¼ 570 cm À1 , hx eg ¼ 380 cm À1 ) for MgO:Cr 3+ system [35] and ( hx ag ¼ 631 cm À1 and hx eg ¼ 400 cm À1 ) for MgO:Fe 2+ [36] respectively.…”

Section: Analysis Of Microscopic Crystal Field Effectssupporting

confidence: 77%

Jahn–Teller effect in 4T2g excited state of Mn2+:MgO

Avram

Andreici

et al. 2015

Chemical Physics

View full text Add to dashboard Cite

Section: Analysis Of Microscopic Crystal Field Effectssupporting

confidence: 77%

Jahn–Teller effect in 4T2g excited state of Mn2+:MgO

Avram

Andreici

et al. 2015

Chemical Physics

View full text Add to dashboard Cite

“…Chen et al [ 29 ] studied by the density functional theory of Raman modes in MgO nanotubes constructing stacks of squares and hexagons of MgO clusters. Raman spectra of Fe-, Co-, Cr-, and Li-ion-doped MgO were investigated experimentally in [ 30 , 31 , 32 , 33 , 34 , 35 ].…”

Section: Introductionmentioning

confidence: 99%

Magnetic, Optical and Phonon Properties of Ion-Doped MgO Nanoparticles. Application for Magnetic Hyperthermia

2023

View full text Add to dashboard Cite

The influence of size and doping effects on the magnetization M, phonon ω and band gap energy Eg of MgO nanoparticles is studied using a microscopic model. The room-temperature ferromagnetism is due to surface or/and doping effects in MgO nanoparticles (NPs). The influence of the spin–phonon interaction is discussed. M increases with decreasing NP size. M and Eg can increase or decrease by different ion doping (Co, Al, La, Fe) due to the different strain that appears. It changes the lattice parameters and the exchange interaction constants. We found that MgO NP with size of 20 nm and Fe- or Co-doping concentration x = 0.1 and x = 0.2, respectively, have a Curie temperature TC = 315 K, i.e., they are appropriate for application in magnetic hyperthermia, they satisfy the conditions for that. The energy of the phonon mode ω = 448 cm−1 increases with decreasing NP size. It increases with increasing Co and Fe, or decreases with Sr ion doping.

show abstract