Angular dependence of metamagnetic transitions in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">HoNi</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">B</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>C

Canfield, P. C.; Bud’ko, S.L.; Bk, Cho; Lacerda, A.; Farrell, D. E.; Johnston-Halperin, Ezekiel; Kalatsky, V. A.; Pokrovsky, V. L.

doi:10.1103/physrevb.55.970

Cited by 93 publications

(139 citation statements)

References 17 publications

(33 reference statements)

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“…TbNi 2 Ge 2 was chosen for an extensive study of angular dependent metamagnetism in an axial (Ising-like) compound [2], showing fairly simple angular dependencies of locally saturated magnetizations (M sat (θ)) and critical fields (H c (θ)). The complexity of the M sat (θ)) and H c (θ) phase diagrams drastically increases for systems where the magnetic moments are confined to the abplane, as shown by the detailed analysis of M(H, θ) data done for HoNi 2 B 2 C [3] and DyAgSb 2 [7]. Furthermore, a theoretical model has been developed by Kalatsky and Pokrovsky [8], to explain the experimentally observed behavior of metamagnetism in HoNi 2 B 2 C. An appropriate variant of this four-position clock model subsequently agreed with the data on DyAgSb 2 [7].…”

Section: Introductionmentioning

confidence: 99%

“…Studies of the anisotropic properties of such materials, with the R in tetragonal point symmetry, revealed anisotropy (in some cases extreme) in members of the RAgSb 2 [1] and RNi 2 Ge 2 [2] series, as well as in the well known quaternary RNi 2 B 2 C compounds, for R=Tb-Er [3,4,5,6]. The strong crystalline electric field (CEF) anisotropy confines the moments either along the c-axis of the tetragonal unit cell (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic and transport properties of RAgGe (R=Tb–Lu) single crystals

Morosan

Bud’ko

Canfield

et al. 2004

Journal of Magnetism and Magnetic Materials

106

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Single crystals of the title compounds were grown out of an AgGe-rich ternary solution. Powder x-ray diffraction data confirmed the hexagonal AlNiZr-type structure (P62m space group), an ordered variant of the Fe 2 P structure type. Antiferromagnetic ordering can be inferred from magnetization, resistance and specific heat measurements, with values of T N between 28.5 K for TbAgGe, and 1.0 K for YbAgGe, which scale roughly with the de Gennes factor. Anisotropic M (H) measurements indicate one or more metamagnetic transitions when the external field is applied along the c-axis (for R=Tb) or perpendicular to it (R = Ho, Er, Tm), or even in both orientations as in the case of DyAgGe. Furthermore, the extreme anisotropy of the magnetization in TmAgGe, where magnetic moments lie in the ab-plane, provides the possibility of studying the angular dependence of metamagnetism in hexagonal compounds with the rare earth in orthorhombic point symmetry.YbAgGe has distinct properties from the rest of the series: an enhanced electronic specific heat coefficient (γ ≈(154.2±2.5)mJ/mol*K 2 ), and apparently small moment magnetic ordering below 1.0 K. This compound appears to be close to a quantum critical point.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermodynamic and transport properties of RAgGe (R=Tb–Lu) single crystals

Morosan

Bud’ko

Canfield

et al. 2004

Journal of Magnetism and Magnetic Materials

106

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“…In the works by Rathnayaka et al [1] and by Canfield et al [2] transport and magnetic measurements on HoNi2B2C for various magnetic fields and low temperatures have been reported. The magnetic phase diagram for HoNi2B2C with fields in the a-b plane is of particular interest.…”

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confidence: 99%

“…The low temperature magnetization data show the existence of 4 metamagnetic phases. The low field phase has been identified by neutron diffraction experiments [3,5] and magnetic measurements [2] with the antiferromagnetic phase, which we denote symbolically ↑↓. The phase boundaries and magnetization in other phases versus magnetic field found in the experiment [2] can be readily explained by assuming that the remaining three phases are as follows: phase 2 -↑↑↓, phase 3 -↑↑→, and the high-field phase 4 -↑.…”

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Microscopic model for the magnetic subsystem inHoNi2B2C

Kalatsky

Pokrovsky

1998

Phys. Rev. B

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We demonstrate that the system of localized magnetic moments in HoNi2B2C can be described by the 4-positional clock model. This model, at a proper choice of the coupling constants, yields several metamagnetic phases in magnetic field at zero temperature in full agreement with the experimental phase diagram. The model incorporates couplings between not nearest neighbors in the direction perpendicular to the ferromagnetic planes. The same model leads to a c-modulated magnetic phase near the Curie temperature. The theoretical value of the modulation wave-vector agrees surprisingly well with that observed by the neutron diffraction experiment without new adjustable parameters.In the works by Rathnayaka et al. In this compound easy magnetization axes are identified with crystallographic directions 110 and 110 . The low temperature magnetization data show the existence of 4 metamagnetic phases. The low field phase has been identified by neutron diffraction experiments [3,5] and magnetic measurements [2] with the antiferromagnetic phase, which we denote symbolically ↑↓. The phase boundaries and magnetization in other phases versus magnetic field found in the experiment [2] can be readily explained by assuming that the remaining three phases are as follows: phase 2 -↑↑↓, phase 3 -↑↑→, and the high-field phase 4 -↑. It means that 2 3 of the spins in the phases 2 and 3 are parallel to one of the easy axes whereas the remaining 1 3 is antiparallel and perpendicular, respectively, to the same axis. Note that all metamagnetic phases are stoichiometric in the meaning that the concentrations of spins parallel, antiparallel, or perpendicular to the reference axis are rational numbers. The phase diagram of HoNi2B2C at zero temperature is especially simple if the components of magnetic field Hx, Hy are chosen as variables. The experimental phase diagram of HoNi2B2C is shown in Fig. 1 (in the original work [2] it has been presented in polar coordinates h, θ h ).Siegrist et al.[9] and Huang et al.[6] determined the structure of Lu and Ho 1:2:2:1 compounds as the body-centered tetragonal lattice with the space group I4/mmm. The xray structure analysis and the neutron-scattering experiments performed by Goldman et al. [3,4] and Grigereit et al. [5][6][7]. showed that an incommensurate modulated magnetic structures with the wave-vectors Kc = 0.915c * and Ka = 0.585a * occur in the temperature range 4.7-6 K. At temperatures below 4.7 K they vanish and an antiferromagnetic reflections corresponding to alternating ferromagnetic ab-planes of Ho 3+ localizad moments appear. Though the spacial arrangement of the phases ↑↑↓ and ↑↑→ can not bee directly derived from the magnetization measurements, it is unplausible that the ferromagnetic in-plane interaction changes suddenly by switching on of the magnetic field. Therefore, we believe that our symbols ↑↑↓ and ↑↑→ correspond to the real spatial sequences of in-plane magnetic moments. In this article we present a simple microscopic model for magnetic subsystem in the 1:2:2:1 compound which expl...

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“…A magnetic phase diagram is described by the results of magnetoresistance, mangetization and heat capacity, indicating a complex magnetic structure at low temperature and magnetic field [4][5][6]. In the paramagnetic phase at high temperature, on the other hand, the magnetic properties of HoNi 2 B 2 C is dominated by Ho 3+ ion, which is influenced not only by the total angular momentum but also by the crystal electric field (CEF).…”

Section: Introductionmentioning

confidence: 99%

Magnetotransport in the magnetic superconductor HoNi₂B₂C

Ohashi

Oomi

Cho

et al. 2010

Physica Status Solidi (b)

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The electrical resistivity and the magnetization of single crystalline HoNi 2 B 2 C have been measured at several magnetic fields. In the paramagnetic region, the magnetization is nicely reproduced by calculations that take the crystal electric field (CEF) into consideration.The magnetoresistance is negative at a wide temperature range, and is strongly dependent on the magnetization. It is interpreted by the reduction of spin-disorder scattering as the moments are polarized.Copyright line will be provided by the publisher 1 Introduction The borocarbides, RNi 2 B 2 C (R= Dy-Lu, Y) are an interesting series of compounds because of the interplay between superconductivity and magnetism [1]. The structure is a varient of ThCr 2 Si 2 type, a body-centered tetragonal crystal structure which consists of alternating layers of HoC planes and Ni 2 B 2 slabs. The compounds of this series are magnetic superconductors for most of the heavy rare earth elements; superconductivity and antiferromagnetism have been found to coexist for the rare earth elements Dy, Ho, Er and Tm.HoNi 2 B 2 C is particularly interesting because superconductivity are observed at T SC = 8.5 K to coexist with several complex magnetic phases [2,3]. A magnetic phase diagram is described by the results of magnetoresistance, mangetization and heat capacity, indicating a complex magnetic structure at low temperature and magnetic field [4][5][6]. In the paramagnetic phase at high temperature, on the other hand, the magnetic properties of HoNi 2 B 2 C is dominated by Ho 3+ ion, which is influenced not only by the total angular momentum but also by the crystal electric field (CEF).The temperature dependence of electrical resistivity also depends strongly on magnetic field in the paramagnetic state [7,8]. Such behavior has been observed in some heavy-fermion compounds, where several kinds of interactions such as RKKY interaction, the Kondo effect and

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Angular dependence of metamagnetic transitions inHoNi2B2C

Cited by 93 publications

References 17 publications

Thermodynamic and transport properties of RAgGe (R=Tb–Lu) single crystals

Thermodynamic and transport properties of RAgGe (R=Tb–Lu) single crystals

Microscopic model for the magnetic subsystem inHoNi2B2C

Magnetotransport in the magnetic superconductor HoNi₂B₂C

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Angular dependence of metamagnetic transitions inHoNi2B2C

Cited by 93 publications

References 17 publications

Thermodynamic and transport properties of RAgGe (R=Tb–Lu) single crystals

Thermodynamic and transport properties of RAgGe (R=Tb–Lu) single crystals

Microscopic model for the magnetic subsystem inHoNi2B2C

Magnetotransport in the magnetic superconductor HoNi2B2C

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Product

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Magnetotransport in the magnetic superconductor HoNi₂B₂C