Effect of Tb substitution for Dy on superconductivity and magnetism in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi mathvariant="normal">Dy</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi mathvariant="normal">Tb</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mi mathvariant="normal">Ni</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">B</mml:mi><mml:mn>2</mml

Choi, Jae-Hyuk; Kim, Heon‐Jung; Kim, H. B.; Doh, Hyeonjin; Lee, Sung‐Ik; Cho, B. K.

doi:10.1103/physrevb.72.054516

Cited by 8 publications

(3 citation statements)

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“…The quaternary nickel boroncarbide RNi 2 B 2 C (R ¼ Y or rare earth) compounds crystallized in the tetragonal filled-ThCr 2 Si 2 structure have attracted much attention because of the interplay of superconductivity and magnetic ordering phenomena. [19][20][21][22][23][24][25][26][27][28] Recently, giant MCE have been observed in antiferromagnetic GdCo 2 B 2 12) and ErRu 2 Si 2 17) and NdMn 2 Ge 0:4 Si 1:6 (ref. 18) compounds of similar crystal structure to RNi 2 B 2 C, which was associated with fieldinduced first order magnetic transition from an antiferromagnetic (AFM) to a ferromagnetic (FM) state.…”

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confidence: 99%

Large Magnetic Entropy Change in Dy$_{1-x}$Ho$_{x}$Ni$_{2}$B$_{2}$C ($x = 0{\mbox{--}}1$) Superconductors

Nishimura

Huo

et al. 2011

Appl. Phys. Express

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The magnetocaloric effect in antiferromagnetic superconductors Dy1-xHoxNi2B2C (x = 0, 0.3, 0.5, 0.7, and 1) has been studied. The magnetic transition temperature TM as well as the temperature of the maximum magnetic entropy change (-ΔSMmax) gradually shift to low temperature with increasing x, while the values of -ΔSMmax remain at almost the same high value. The observed large magnetic entropy is related to a field-induced first-order metamagnetic transition from antiferromagnetic to ferromagnetic state. The large values of ΔSM and high relative cooling power with tuneable TM indicate that Dy1-xHoxNi2B2C could be used for low-temperature magnetic refrigeration.

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confidence: 99%

Large Magnetic Entropy Change in Dy$_{1-x}$Ho$_{x}$Ni$_{2}$B$_{2}$C ($x = 0{\mbox{--}}1$) Superconductors

Nishimura

Huo

et al. 2011

Appl. Phys. Express

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“…An almost unchanged T N was found in the Dy 1Àx Tb x Ni 2 B 2 C system for x < 0:6. 17) The rapid suppression of superconductivity in non-magnetic Y or Lu diluted DyNi 2 B 2 C systems are also reported. [18][19][20][21][22] The magnetic structure of DyNi 2 B 2 C consists of ferromagnetically aligned Dy spins in the ab-plane, but antiferromagnetically coupled along the caxis.…”

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confidence: 88%

Effect of Nonmagnetic Ion Lu Substitution for Dy on Superconductivity and Magnetism in Antiferromagnetic Superconductor Dy_1-xLu_xNi₂B₂C Compound

Nishimura

Ikeda

2007

jjap

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A series of Dy 1Àx Lu x Ni 2 B 2 C (x ¼ 0 {1) compounds have been investigated by X-ray diffraction and by examining the temperature dependences of electrical resistivity, magnetization and heat capacity. All the samples exhibit the same LuNi 2 B 2 C-type structure; and lattice parameters depend almost linearly on the Lu concentration x. The superconducting transition temperature T c decreases rapidly with increasing x, and superconductivity disappears at approximately x ¼ 0:2, then increases with a further increase in x. The magnetic transition temperature T M and the effective magnetic moment P eff decrease gradually with increasing x. The ferrimagnetic-like behavior emerges at about x ¼ 0:2; which can be the main reason causing the suppression of superconductivity. The temperature dependence of the magnetic entropy S m originated from Dy ions has been evaluated on the basis of heat capacity data. The saturated values of S m ðTÞ=ð1 À xÞ are approximately 90% of R ln 4 and the effective magnetic moment normalized by Dy concentration is almost unchanged, which indicates that the magnetic ground state of Dy 3þ does not show a pronounced change.

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“…While assuming that each magnetic orders, the antiferromagnetic and spiral orders in Ho 1-x Dy x Ni 2 B 2 C, attack separately or together the superconductivity, we could obtain a doping dependence of superconducting transition temperature. We found that it is important to investigate the competition between superconductivity and magnetism [9][10][11] to understand the superconductivity in RNi 2 B 2 C. …”

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Phenomenological Theory of Superconductivity and Effects of Antiferromagnetic and Spiral Order in Ho_1-xDy_xNi₂B₂C

Kim

Doh

et al. 2007

J. Phys. Soc. Jpn.

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The coexistence of superconductivity and magnetism in Ho 1-x Dy x Ni 2 B 2 C is studied by using a phenomenological model that is based on the Ginzburg-Landau theory. This model includes two magnetic and two superconducting order parameters accounting for the multiband structure of Ho 1-x Dy x Ni 2 B 2 C. The doping dependence of T c and the effects of antiferromagnetic and spiral order in this material are analyzed.KEYWORDS: Ginzburg-Landau theory, Superconductivity, Antiferromagnetic order, Spiral order,The series of nickel-borocarbide, RNi 2 B 2 C (R = Y, Yb, Dy, Ho, Er, Tm and Tb) 1),2) , is a kind of magnetic superconductor.3) This class of materials shows a variety of magnetic ordered states, depending on the rare-earth atoms R.4) Among them, HoNi 2 B 2 C and DyNi 2 B 2 C constitute ideal materials to study the relation between superconductivity and magnetism because they display the same antiferromagnetic order, but have different values of the Néel temperature T N . Experiments show that simple de Gennes scaling of T c , which is expected to monotonically decrease with increasing (g J -1) 2 J (J + 1) according to the Abrikosov-Gor'kov theory, 5) does not exist for the alloy Ho 1-x Dy x Ni 2 B 2 C. (Fig. 1) HoNi 2 B 2 C and DyNi 2 B 2 C have antiferromagnetic (AF) order below T N = 5 and 10 K, respectively 6) . The spins order ferromagnetically within the a-b plane and antiferromagnetically in the c direction. For HoNi 2 B 2 C, a spiral (SP) short-range correlation exists i.e., the spins are aligned ferromagnetically in the a-b plane and are rotated by ~ 163° between adjacent planes. According to the band calculation for LuNi 2 B 2 C )7) , the Ni(3d) band makes the largest contribution to the density of states at the Fermi surface, suggesting that it is dominant in the formation of the superconducting state. However, other bands involving hybridization with B(2p), C(2p), and Ho(5d) or Dy(5d) should be included in the superconductivity. Hence, the superconductivity of nickel-borocarbide materials should be described by using a multiband model.For the AF order, the influence of the rare-earth magnetic moments is canceled for the Ni sites located exactly in the center of a tetrahedron of nearest Ho(Dy) atoms. The band originating from Ni(3d) no longer feels the magnetic moment of Ho(Dy) below the Néel temperature. On the other hand, the field generated by the moments of Ho(Dy) is not canceled at sites of other elements. In the case of SP correlation, the magnetic field at the Ni site is not canceled exactly. The SP phase also affects the superconductivity of the Ni(3d) band. For other ions, the effect of the SP correlation is not so important because the dominant effect essentially comes from the AF order. A simple phenomenological model 8) with two superconducting order parameters,

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Effect of Tb substitution for Dy on superconductivity and magnetism inDy1−xTbxNi2B2

Cited by 8 publications

References 34 publications

Large Magnetic Entropy Change in Dy$_{1-x}$Ho$_{x}$Ni$_{2}$B$_{2}$C ($x = 0{\mbox{--}}1$) Superconductors

Large Magnetic Entropy Change in Dy$_{1-x}$Ho$_{x}$Ni$_{2}$B$_{2}$C ($x = 0{\mbox{--}}1$) Superconductors

Effect of Nonmagnetic Ion Lu Substitution for Dy on Superconductivity and Magnetism in Antiferromagnetic Superconductor Dy_1-xLu_xNi₂B₂C Compound

Phenomenological Theory of Superconductivity and Effects of Antiferromagnetic and Spiral Order in Ho_1-xDy_xNi₂B₂C

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Effect of Tb substitution for Dy on superconductivity and magnetism inDy1−xTbxNi2B2

Cited by 8 publications

References 34 publications

Large Magnetic Entropy Change in Dy$_{1-x}$Ho$_{x}$Ni$_{2}$B$_{2}$C ($x = 0{\mbox{--}}1$) Superconductors

Large Magnetic Entropy Change in Dy$_{1-x}$Ho$_{x}$Ni$_{2}$B$_{2}$C ($x = 0{\mbox{--}}1$) Superconductors

Effect of Nonmagnetic Ion Lu Substitution for Dy on Superconductivity and Magnetism in Antiferromagnetic Superconductor Dy1-xLuxNi2B2C Compound

Phenomenological Theory of Superconductivity and Effects of Antiferromagnetic and Spiral Order in Ho1-xDyxNi2B2C

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Effect of Nonmagnetic Ion Lu Substitution for Dy on Superconductivity and Magnetism in Antiferromagnetic Superconductor Dy_1-xLu_xNi₂B₂C Compound

Phenomenological Theory of Superconductivity and Effects of Antiferromagnetic and Spiral Order in Ho_1-xDy_xNi₂B₂C