Features of Magnetic and Magnetoelectric Properties in Rare-Earth Aluminum Borates RAl&lt;sub&gt;3&lt;/sub&gt;(BO&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;4&lt;/sub&gt;

Kostyuchenko, N. V.; Ivanov, V. I.; Mukhin, A. A.; Popov, Alexander I.; Zvezdin, A. K.

doi:10.1109/tmag.2014.2329954

Cited by 3 publications

(9 citation statements)

References 13 publications

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“…The susceptibility along the a-axis agrees well with Ref. [4,24,27] both qualitatively and quantitatively. We note that the c-axis susceptibility in Ref.…”

Section: Methodssupporting

confidence: 85%

“…2, and that measured in Refs. [24,27], which might be due to small fraction from the a-axis signal. The same effect probably explains small upturn of  c at the lowest temperatures in our data (inset to Fig.…”

Section: Resultsmentioning

confidence: 99%

“…In this work we present the results of terahertz experiments of the low-energy crystal-field states of Tm 3+ ions in thulium alumo-borate which are responsible for magnetic and magnetoelectric behavior in this material. Magnetic susceptibility of TmAl 3 (BO 3 ) 4 reveal strong anisotropy at low temperatures with a significant increase in the basal ab-plane (easy directions) compared to the c-axis [6,24,27]. The observed simultaneous increase of field-induced electric polarization in TmAl 3 (BO 3 ) 4 [4] indicates the prevailing influence of the low-energy crystal-field Tm 3+ states not only on magnetic but also on magnetoelectric properties of the crystal.…”

Section: Introductionmentioning

confidence: 91%

“…Magnetic susceptibility of TmAl 3 (BO 3 ) 4 reveal strong anisotropy at low temperatures with a significant increase in the basal ab-plane (easy directions) compared to the c-axis [6,24,27]. The observed simultaneous increase of field-induced electric polarization in TmAl 3 (BO 3 ) 4 [4] indicates the prevailing influence of the low-energy crystal-field Tm…”

Section: Introductionmentioning

confidence: 91%

“…This theory is based on a single ion mechanism due to electric dipole moment of rare-earth ion 4f shells and due to ion displacement induced by exchange magnetic fields. This approach has been applied to describe temperature and field dependences of polarization in Nd, Sm and Eu ferroborates [23] as well as in alumoborates with R = Tm, Ho, Tb [22,24]. An important role of low-energy levels, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Terahertz spectroscopy of crystal-field transitions in magnetoelectric TmAl3(BO3)4

et al. 2016

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Dynamic magnetic properties of magnetoelectric TmAl 3 (BO 3 ) 4 borate have been investigated by terahertz spectroscopy. Crystal field (CF) transitions within the ground multiplet 3 H 6 of Tm 3+ ions are observed and they are identified as magnetic-dipole transitions from the ground singlet A 1 to the next excited doublet E of Tm 3+ ions. Unexpected fine structure of the transitions is detected at low temperatures. The new modes are assigned to local distortions of the sites with D 3 symmetry by Bi 3+ impurities, which resulted in the splitting of A 1 →E transi on. Two types of locally distorted sites are identified and investigated. The main contribution to the static magnetic susceptibility is shown to be determined by the matrix elements of the observed magnetic transitions. We demonstrate that even in case of local distortions the symmetry of the undistorted crystal is recovered for magnetic and for quadratic magnetoelectric susceptibilities.

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“…The susceptibility along the a-axis agrees well with Ref. [4,24,27] both qualitatively and quantitatively. We note that the c-axis susceptibility in Ref.…”

Section: Methodssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Terahertz spectroscopy of crystal-field transitions in magnetoelectric TmAl3(BO3)4

et al. 2016

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Elastic, magnetoelastic, magnetopiezoelectric, and magnetodielectric characteristics of HoAl3(BO3)4

Bilych

Kolodyazhnaya

Zhekov

et al. 2020

Low Temperature Physics

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The main elastic moduli and piezoelectric modulus have been measured in holmium alumoborate single crystals. The renormalization of the permittivity, piezoresponse, and sound velocities, driven by the nematic-like paramagnetic phase in the sample, is considered. A significant variability of the results is detected, which is caused, presumably, by the fact that, under the action of external fields, the motion trajectory of the nematic-like phase’s director depends on random defects of thermoelastic origin. It is shown that above 5 K, the temperature dependences of the studied parameters are well-described using holmium ion’s known ground multiplet spectrum, formed by the interaction with the crystal field. Changes in the C44-mode velocity in the sub-Kelvin temperature range are measured.

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Sign change of polarization rotation under time or space inversion in magnetoelectric YbAl3(BO3)4

et al. 2019

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Materials with optical activity can rotate the polarization plane of transmitted light. The most typical example is the natural optical activity, which has the symmetry property of changing sign after space inversion but being invariant to time inversion. Faraday rotation exhibits the opposite:it is invariant to space inversion but changes sign after time reversal. Here, we demonstrate that in a magnetoelectric material, another type of polarization rotation is possible. This effect is investigated in magnetoelectric YbAl 3 (BO 3 ) 4 under the viewpoint of time and space inversion symmetry arguments. We observe the sign change of the rotation sense under either time or space reversal. This investigation proves that the polarization rotation in YbAl 3 (BO 3 ) 4 must be classified as gyrotropic birefringence, which has been discussed within the idea of time-reversal breaking in underdoped cuprates. The diagonal terms in the magnetoelectric susceptibility are responsible for the observed signal of gyrotropic birefringence. Further analysis of the experimental spectra reveals a substantial contribution of the natural optical activity to the polarization rotation. We also demonstrate that the observed activity originates from the magnetoelectric susceptibility.

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Features of Magnetic and Magnetoelectric Properties in Rare-Earth Aluminum Borates RAl<sub>3</sub>(BO<sub>3</sub>)<sub>4</sub>

Cited by 3 publications

References 13 publications

Terahertz spectroscopy of crystal-field transitions in magnetoelectric TmAl3(BO3)4

Terahertz spectroscopy of crystal-field transitions in magnetoelectric TmAl3(BO3)4

Elastic, magnetoelastic, magnetopiezoelectric, and magnetodielectric characteristics of HoAl3(BO3)4

Sign change of polarization rotation under time or space inversion in magnetoelectric YbAl3(BO3)4

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