Magnetic pair breaking 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

Goldman, A. I.; Stassis, C.; Canfield, Paul C.; Zarestky, J.; Dervenagas, P.; Cho, B. K.; Johnston, D. C.; Sternlieb, B. J.

doi:10.1103/physrevb.50.9668

Cited by 207 publications

(116 citation statements)

References 12 publications

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“…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.…”

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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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confidence: 99%

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confidence: 99%

Microscopic model for the magnetic subsystem inHoNi2B2C

Kalatsky

Pokrovsky

1998

Phys. Rev. B

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“…Both T N and T * decreases as in- creasing magnetic field, and disappear at H= 1 T and 2 T, respectively. Although there are three magnetic transitions (T N , T * , T M ) in the neutron scattering and specific heat measurements [3,4], no anomaly is observed near the paramagnetic-antiferromagnetic transition temperature T M ∼ 6 K. Because of the large value of |dM/dT | due to Curie-weiss law, it may be difficult to detect an anomaly near T M at low magnetic field. On the other hand, a brood maximum appears around T M above 4 T, where an anomaly is observed in the results of the specific heat [4].…”

Section: Introductionmentioning

confidence: 94%

“…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].…”

Section: Introductionmentioning

confidence: 99%

“…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].…”

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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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Pair‐Breaking and Magnetic Ordering in the Pseudo‐Quaternary Intermetallic Series (Y, Gd)Ni₂B₂C

Massalami

Bud’ko

Giordanengo

et al. 1995

Physica Status Solidi (b)

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MASSALAMI (a), S. L. BUDKO (a), B. GIORDANENGO (a), M. B. FONTES (a), J. C. MONDRAGON (a), E. M. BAGGIO-SAITOVITCH (a), and A. SULPICE (b) Alloying influences on the superconducting and magnetic properties of the (Gd,Y -JNi,B,C series are studied. For x < 0.25,T' is degraded linearly with x as expected from the theory of Abrikosov-Gorkov.Magnetization and magnetoresistivity measurements for x = 0.22 show that the magnetic saturation is attained only for fields as high as 80 kOe implying that even for such a low Gd concentration, antiferromagnetic couplings are quite strong. On the other hand, the magnetic dilution in the Heisenberg antiferromagnet GdNi,B2C causes a linear depression of the magnetic ordering temperatures as expected from molecular field theory. The abrupt quench of superconductivity for x > 0.25 and the coexistence of superconductivity with long-range antiferromagnetic order for 0.1 < x < 0.25 are discussed.

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Magnetic pair breaking inHoNi2B2C

Cited by 207 publications

References 12 publications

Microscopic model for the magnetic subsystem inHoNi2B2C

Microscopic model for the magnetic subsystem inHoNi2B2C

Magnetotransport in the magnetic superconductor HoNi₂B₂C

Pair‐Breaking and Magnetic Ordering in the Pseudo‐Quaternary Intermetallic Series (Y, Gd)Ni₂B₂C

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Magnetic pair breaking inHoNi2B2C

Cited by 207 publications

References 12 publications

Microscopic model for the magnetic subsystem inHoNi2B2C

Microscopic model for the magnetic subsystem inHoNi2B2C

Magnetotransport in the magnetic superconductor HoNi2B2C

Pair‐Breaking and Magnetic Ordering in the Pseudo‐Quaternary Intermetallic Series (Y, Gd)Ni2B2C

Contact Info

Product

Resources

About

Magnetotransport in the magnetic superconductor HoNi₂B₂C

Pair‐Breaking and Magnetic Ordering in the Pseudo‐Quaternary Intermetallic Series (Y, Gd)Ni₂B₂C