Magnetism of rare earth tetraborides

Maťaš, S.; Siemensmeyer, K.; Wheeler, Elisa M.; Wulf, E.; Beyer, R.; Hermannsdörfer, Th; Ignatchik, O.; Uhlarz, M.; Flachbart, К.; Gabáni, S.; Priputen, P.; Efdokimova, A.; Shitsevalova, N. Yu.

doi:10.1088/1742-6596/200/3/032041

Cited by 50 publications

(57 citation statements)

References 7 publications

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“…[1][2][3][4][5][6][7] Regarding properties, many studies have been carried out into the magnetism of borides, [7][8][9][10][11][12][13][14] and recent especial efforts have been made to develop the high temperature thermoelectric properties of novel borides. [15][16][17][18][19][20] Being refractory materials, thermoelectric borides have the potential to be used in high impact energy-saving applications like topping cycles for power plants and waste heat power generation in industry.…”

confidence: 99%

Thermal conductivity of PrRh4.8B2, a layered boride compound

et al. 2017

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confidence: 99%

Thermal conductivity of PrRh4.8B2, a layered boride compound

et al. 2017

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“…The intermediate temperature phase (abbreviated to the IT phase in the rest of the paper) was determined to be an incommensurate state with propagation vector q = (δ,δ,δ ), where δ = 0.022 and δ = 0.43, while the low temperature phase was determined to have noncollinear antiferromagnetic order [19]. Magnetization measurements at T = 2 K with a magnetic field applied parallel to the c axis have shown a [20]. Significant theoretical work using Heisenberg [21,22] and Ising [23][24][25] spins has been used to model a variety of members of the RB 4 family with many finding a plateau occurring at M/M sat = 1 3 , which is experimentally observed in TbB 4 and HoB 4 [20,26].…”

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confidence: 99%

Field-induced magnetic states in holmium tetraboride

et al. 2017

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A study of the zero field and field induced magnetic states of the frustrated rare earth tetraboride HoB 4 has been carried out using single crystal neutron diffraction complemented by magnetization measurements. In zero field, HoB 4 shows magnetic phase transitions at T N1 = 7.1 K to an incommensurate state with a propagation vector (δ,δ,δ ), where δ = 0.02 and δ = 0.43 and at T N2 = 5.7 K to a noncollinear commensurate antiferromagnetic structure. Polarized neutron diffraction measurements in zero field have revealed that the incommensurate reflections, albeit much reduced in intensity, persist down to 1.5 K despite antiferromagnetic ordering at 5.7 K. At lower temperatures, application of a magnetic field along the c axis initially re-establishes the incommensurate phase as the dominant magnetic state in a narrow field range, just prior to HoB 4 ordering with an up-up-down ferrimagnetic structure characterized by the (h k 1 3 )-type reflections between 18 and 24 kOe. This field range is marked by the previously reported M/M sat = 1 3 magnetization plateau, which we also see in our magnetization measurements. The region between 21 and 33 kOe is characterized by the increase in the intensity of the antiferromagnetic reflections, such as (100), the maximum of which coincides with the appearance of the narrow magnetization plateau with M/M sat ≈ 3 5 . Further increase of the magnetic field results in the stabilization of a polarized state above 33 kOe, while the incommensurate reflections are clearly present in all fields up to 59 kOe. We propose the H -T phase diagram of HoB 4 for the H c containing both stationary and transitionary magnetic phases which overlap and show significant history dependence.

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“…The metallic RB 4 (R = Ho,Er,Tm,Tb) compounds order AF with period-doubling Néel ground states with Ising-like moments oriented perpendicular to the SSL planes [13][14][15][16]. In metallic The neutron diffraction measurements presented here demonstrate that the in-plane Ising-like Yb moments in Yb 2 Pt 2 Pb have a remarkably complex magnetic structure, with a commensurate superlattice of ordered stripes consisting of moment-bearing and magnetically compensated Yb pairs with moments perpendicular to the (110) and (−110) dimer bonds.…”

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“…The metallic RB 4 (R = Ho,Er,Tm,Tb) compounds order AF with period-doubling Néel ground states with Ising-like moments oriented perpendicular to the SSL planes [13][14][15][16]. In metallic Yb 2 Pt 2 Pb, Yb moments form the orthogonal dimers of the SSL planes, and AF order appears below the Néel temperature T N = 2.07 K [17].…”

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Magnetic structure ofYb2Pt2Pb: Ising moments on the Shastry-Sutherland lattice

Miiller

Kim

et al. 2016

Phys. Rev. B

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Neutron diffraction measurements were carried out on single crystals and powders of Yb 2 Pt 2 Pb, where Yb moments form two interpenetrating planar sublattices of orthogonal dimers, a geometry known as ShastrySutherland lattice, and are stacked along the c axis in a ladder geometry. Yb 2 Pt 2 Pb orders antiferromagnetically at T N = 2.07 K, and the magnetic structure determined from these measurements features the interleaving of two orthogonal sublattices into a 5 × 5 × 1 magnetic supercell that is based on stripes with moments perpendicular to the dimer bonds, which are along (110) and (−110). Magnetic fields applied along (110) or (−110) suppress the antiferromagnetic peaks from an individual sublattice, but leave the orthogonal sublattice unaffected, evidence for the Ising character of the Yb moments in Yb 2 Pt 2 Pb that is supported by point charge calculations. Specific heat, magnetic susceptibility, and electrical resistivity measurements concur with neutron elastic scattering results that the longitudinal critical fluctuations are gapped with E 0.07 meV. DOI: 10.1103/PhysRevB.93.104419 Much attention is focused on coupled spin-dimer systems, where frustrated magnetic interactions can lead to spin liquid ground states [1,2]. The Shastry-Sutherland lattice (SSL), consisting of planes of orthogonal dimers with intradimer exchange J and interdimer exchange J , is of particular interest as it has been exactly solved [3] to show that the ground state is ordered antiferromagnetically (AF) for J /J less than a critical value (J /J ) C and otherwise has a singlet ground state with gapped magnetic excitations. Insulating SrCu 2 (BO 3 ) 2 is an example of the SSL dimer liquid ground state [4][5][6]. Here, frustrated exchange interactions tend to localize singlet and triplet dimers into complex ordered superstructures at high fields [7][8][9], resulting in quantized plateaus in the magnetic field B dependence of the magnetization M(B) [10][11][12].Most SSL systems are magnetically ordered, where the closure of the singlet dimer gap yields a nonzero magnetization that makes AF order possible even for B = 0. The metallic RB 4 (R = Ho,Er,Tm,Tb) compounds order AF with period-doubling Néel ground states with Ising-like moments oriented perpendicular to the SSL planes [13][14][15][16]. In metallic The neutron diffraction measurements presented here demonstrate that the in-plane Ising-like Yb moments in Yb 2 Pt 2 Pb have a remarkably complex magnetic structure, with a commensurate superlattice of ordered stripes consisting of moment-bearing and magnetically compensated Yb pairs with moments perpendicular to the (110) and (−110) dimer bonds. The magnetic cell contains 200 Yb atoms, whose Ising character results in the formation of two independent and orthogonal sublattices that are separately polarized by magnetic fields along either (110) or (−110). The persistence of AF order in the surviving AF sublattice shows that the two orthogonal bonds of the B = 0 SSL are effectively decoupled in magnetic field, leading to a un...

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Magnetism of rare earth tetraborides

Cited by 50 publications

References 7 publications

Thermal conductivity of PrRh4.8B2, a layered boride compound

Thermal conductivity of PrRh4.8B2, a layered boride compound

Field-induced magnetic states in holmium tetraboride

Magnetic structure ofYb2Pt2Pb: Ising moments on the Shastry-Sutherland lattice

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