Optical study of the electronic structure and magnetic ordering in a weak ferromagnet FeBO3

Markovin, P. A.; Kalashnikova, A.M.; Pisarev, R. V.; Rasing, T.H.M.

doi:10.1134/s0021364007230063

Cited by 18 publications

(15 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Most likely the low-symmetry effects are the main source responsible for the crucial difference in the optical response between Fe 3 BO 6 and two other iron borates FeBO 3 ͑T N = 348 K͒ and GdFe 3 ͑BO 3 ͒ 4 ͑T N =37 K͒. 79,80 These two borates are highly transparent in the visible spectral range and the CT bands are less intense and shifted to higher photon energy. Interestingly, and at variance with most of ferrites where the Fe-O-Fe bonds form a 3D network, the main motifs of the crystal structure in GdFe 3 ͑BO 3 ͒ 4 are spiral chains of FeO 6 octahedra running along the c axis and linked together by their edges.…”

Section: B Discussionmentioning

confidence: 99%

“…Optical transitions in Fe 3 BO 6 are noticeably more intense and the band gap is red-shifted in comparison to other borates, FeBO 3 ͑T N = 348 K͒ and GdFe 3 ͑BO 4 ͒ 3 ͑T N =37 K͒. 79,80 These borates are highly transparent in the visible spectral range, the charge transfer bands are less intense and shifted to higher photon energy. The most plausible explanation of these differences can be related to the iron/oxide ratio which varies in these three compounds as 1 / 2, 1 / 3 and 1 / 4, respectively.…”

Section: Fe 3+ Ions In Octahedral Positionsbismuth Ferrite Bifeomentioning

confidence: 98%

See 1 more Smart Citation

Optical spectroscopy of charge transfer transitions in multiferroic manganites, ferrites, and related insulators

Moskvin¹,

Pisarev

2010

Low Temperature Physics

Self Cite

View full text Add to dashboard Cite

The results of theoretical and experimental studies of charge transfer (CT) transitions in multiferroic manganites, ferrites, and related insulators are reviewed. Starting with a simple cluster model approach one-center p-d and two-center d-d CT transitions, their polarization properties, the role played by structural parameters, orbital mixing, and spin degree of freedom are all addressed. Optical ellipsometry data in the spectral range of 0.6–5.8eV in perovskite and hexagonal rare-earth manganites RMnO3 and in orthorhombic manganites RMn2O5 are analyzed. Two groups of iron oxides, where Fe3+ ions occupy either only octahedral positions (BiFeO3, orhoferrites RFeO3 et al.) and materials with Fe3+ ions both in octahedral and tetrahedral positions (hematite α-Fe2O3, garnets RFe5O12, lithium ferrite LiFe5O8, Ca2Fe2O5 et al.), are discussed.

show abstract

Section: B Discussionmentioning

confidence: 99%

Section: Fe 3+ Ions In Octahedral Positionsbismuth Ferrite Bifeomentioning

confidence: 98%

Optical spectroscopy of charge transfer transitions in multiferroic manganites, ferrites, and related insulators

Moskvin¹,

Pisarev

2010

Low Temperature Physics

Self Cite

View full text Add to dashboard Cite

show abstract

“…At the photon energy E 0 = 1.54 eV FeBO 3 is characterized by a strong crystallographic birefringence ⌬n = n x − n z = 0.08. 72 Below T N the interaction of light with the medium can be described phenomenologically in terms of contributions to the dielectric permittivity tensor caused by the presence of magnetic order. It is convenient to decompose ij into anti-symmetric ij a =− ji a and symmetric ij s = ji s parts, 73 which are, according to the Onsager principle, odd and even with respect to the ͑anti͒ferromagnetic vectors, respectively.…”

Section: Magneto-optical Propertiesmentioning

confidence: 99%

“…8 The main contribution to the refractive index in this region stems from the allowed charge-transfer transition located above 2.9 eV. 72 FeBO 3 is an optically uniaxial crystal with the optical axis parallel to the crystallographic z axis. The dielectric permittivity tensor in the paramagnetic phase has only two nonvanishing components xx 0 = yy 0 zz 0 .…”

Section: Magneto-optical Propertiesmentioning

confidence: 99%

Impulsive excitation of coherent magnons and phonons by subpicosecond laser pulses in the weak ferromagnetFeBO3

et al. 2008

Self Cite

View full text Add to dashboard Cite

Coherent magnons and phonons are excited by subpicosecond laser pulses in the weak ferromagnet FeBO 3 . Impulsive stimulated Raman scattering ͑ISRS͒ is proven to be the microscopic mechanism of the excitation. It is shown that coherent magnons can be excited by both linearly and circularly polarized laser pulses where the efficiency of the process depends on the mutual orientation of the magnetic and crystallographic axes and the light propagation direction. The strong ellipticity of the ferromagnetic magnon mode is demonstrated, both experimentally and theoretically, to be essential for the excitation and observation of such coherent magnons. Because of this ellipticity, the amplitude of the coherent magnons excited by linearly polarized light may exceed by 2 orders of magnitude the amplitude of those excited by circularly polarized light. The primary difference between the excitation of coherent magnons by linearly polarized pulses via ISRS and via the earlier reported process of photoinduced magnetic anisotropy is discussed. Furthermore, the ISRS process is found to be responsible for the excitation of two optical phonon branches ͑8.4 and 12.1 THz͒ observed in our experiments. A coherent excitation, with a temperature-independent frequency of 0.7 THz, has also been observed in the magnetically ordered phase but could not be assigned to any optical phonon modes known in FeBO 3 . The well-pronounced dependence of the amplitude of this mode on temperature suggests that this mode of nonmagnetic origin becomes Raman active only in the magnetically ordered phase and, therefore, can be excited and observed only below the Néel temperature.

show abstract

“…Let us fix on a couple of examples. Thus, Fe 3+ ion oxides, such as FeBO3 and GdFe3(BO3)4, are highly transparent magnetic materials in the visible spectral range [31,32], whereas the iron oxide hematite α-Fe2O3 with the same crystal structure as FeBO3 is completely opaque. On the other hand, Fe3BO6 is also opaque, similar to α-Fe2O3, because of a larger relative concentration of iron ions in comparison to FeBO3.…”

mentioning

confidence: 99%

Lattice dynamics and a magnetic-structural phase transition in the nickel orthoborateNi3(BO3)2
Pisarev
¹
,
Prosnikov
²
,
Davydov
³

et al. 2016
Phys. Rev. B
Self Cite
22
1
10
0
View full text Add to dashboard Cite

Nickel orthoborate Ni3(BO3)2 having a complex orthorhombic structure Pnnm (#58, Z=2) of the kotoite type is known for quite a long time as an antiferromagnetic material below We performed the symmetry analysis of the phonon modes at the center of the Brillouin zone.The structural parameters and phonon modes were calculated using Dmol3 program. We report and analyze results of infrared and Raman studies of phonon spectra measured in all required polarizations. Most of the even and odd phonons predicted on the basis of the symmetry analysis and theoretical calculations were reliably identified in the measured spectra. A clear evidence of the spin-phonon interaction was found for some particular phonons below TN. Unexpected emergence of several very narrow and weak phonon lines was observed in the infrared absorption spectra exactly at the magnetic ordering temperature TN. Moreover, anomalous behavior was found for some Raman phonons. Emergence of new phonon modes in the infrared and Raman spectra exactly at TN proves existence of a magnetostructural phase transition of a new type in Ni3(BO3)2. A possible nature of this transition is discussed.

show abstract

Optical study of the electronic structure and magnetic ordering in a weak ferromagnet FeBO3

Cited by 18 publications

References 14 publications

Optical spectroscopy of charge transfer transitions in multiferroic manganites, ferrites, and related insulators

Optical spectroscopy of charge transfer transitions in multiferroic manganites, ferrites, and related insulators

Impulsive excitation of coherent magnons and phonons by subpicosecond laser pulses in the weak ferromagnetFeBO3

Lattice dynamics and a magnetic-structural phase transition in the nickel orthoborateNi3(BO3)2
Pisarev
¹
,
Prosnikov
²
,
Davydov
³

et al. 2016
Phys. Rev. B
Self Cite
22
1
10
0
View full text Add to dashboard Cite

Contact Info

Product

Resources

About

Optical study of the electronic structure and magnetic ordering in a weak ferromagnet FeBO3

Cited by 18 publications

References 14 publications

Optical spectroscopy of charge transfer transitions in multiferroic manganites, ferrites, and related insulators

Optical spectroscopy of charge transfer transitions in multiferroic manganites, ferrites, and related insulators

Impulsive excitation of coherent magnons and phonons by subpicosecond laser pulses in the weak ferromagnetFeBO3

Lattice dynamics and a magnetic-structural phase transition in the nickel orthoborateNi3(BO3)2Pisarev1, Prosnikov2, Davydov3 et al. 2016Phys. Rev. BSelf Cite221100View full textAdd to dashboardCite

Contact Info

Product

Resources

About

Lattice dynamics and a magnetic-structural phase transition in the nickel orthoborateNi3(BO3)2
Pisarev
¹
,
Prosnikov
²
,
Davydov
³

et al. 2016
Phys. Rev. B
Self Cite
22
1
10
0
View full text Add to dashboard Cite