Magnetization, magnetoelectric polarization, and specific heat of HoGa3(BO3)4

Crystal growth, structure, infrared spectroscopy, and luminescent properties of rare-earth gallium borates RGa3(BO3)4, R=Nd, Sm–Er, Y

“…In contrast to extensive contemporary studies of aluminum, iron, and chromium borates, only a few papers are known concerning structural investigations (NdGa 3 (BO 3 ) 4 , R32 [13]), crystal growth, and spectroscopic properties [19,20] of RE gallium borates. At the same time, as was found quite recently, HoGa 3 (BO 3 ) 4 shows an unusually large magnetoelectric effect [21]. Thus, RE gallium borates deserve to be considered as promising materials not only for luminescent [19] and non-linear laser applications but also for the use in spintronic devices.…”

Magnetoelectric and magnetic properties of aluminum borates Ho1 − x Nd x Al3(BO3)4

“…2 The observed polarization reaches at T = 5 K in 9 T the value ΔP ab (B b ) ≈ -2630 and -1380 μC/m 2 for Ho 0.8 Nd 0.2 Al 3 (BO 3 ) 4 and Ho 0.5 Nd 0.5 Al 3 (BO 3 ) 4 , respectively. These ΔP values strongly exceed all known values (given below in μC/m 2 ) for iron borates (~300 in NdFe 3 (BO 3 ) 4 [23] and HoFe 3 (BO 3 ) 4 [24], 500 in SmFe 3 (BO 3 ) 4 [25], ~900 in Ho 0.5 Nd 0.5 Fe 3 (BO 3 ) 4 [13], and ~1000 in Ho 0.75 Nd 0.25 Fe 3 (BO 3 ) 4 [26]), aluminum borates (~140 in ErAl 3 (BO 3 ) 4 [10] and ~750 in TmAl 3 (BO 3 ) 4 [8,10]), and galloborate HoGa 3 (BO 3 ) 4 (~1020) [5], and they are the second best result, yielding only to the record high value in HoAl 3 (BO 3 ) 4 (~5240) [11]. The mea surements indicated that the polarization for B || c is much less than that at B ⊥ c as in HoAl 3 (BO 3 ) 4 .…”

“…In our calculations, we used the results of studying compounds isostructural to Ho 1 -x Nd x Al 3 (BO 3 ) 4 : HoAl 3 (BO 3 ) 4 [11,16], TmAl 3 (BO 3 ) 4 [17], HoGa 3 (BO 3 ) 4 [5], iron borates HoFe 3 (BO 3 ) 4 [18] and with other R [2,19], as well as paramagnetic zircons RXO 4 (X = P, V) [20].…”

“…Trigonal rare earth borates RM 3 (BO 3 ) 4 (M = Fe, Al, Cr, Ga, Sc) have been intensely studied in the last decade owing to their interesting physical properties and their variety at different combinations of R and M elements (see, e.g., [1][2][3][4][5][6] and review [7]). It was estab lished that borates with two magnetic subsystems (iron borates RFe 3 (BO 3 ) 4 ) belong to multiferroics [1,3,7].…”

Spectroscopy of f−f transitions, crystal-field calculations, and magnetic and quadrupole helix chirality in DyFe3(BПопова1, Чукалина2, Болдырев3 et al. 2017Phys. Rev. BSelf Cite9000View full textAdd to dashboardCite

“…The most known representatives of this family are aluminum borates, which are used in selffrequency doubling and self-frequency summing lasers (see, e.g., Refs [5][6][7] and references therein). Additional interest of scientists in the huntite borates is connected with an appreciable magnetoelectric effect found in the yttrium and rare-earth (RE) iron borates (see, e.g., Refs [8][9][10][11] and references therein) and in the RE aluminum and gallium borates [12][13][14][15].…”