Surface and bulk magnetic properties of pyrite<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">NiS</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>: Magnetization and neutron-scattering studies

Thio, Tineke; Bennett, J. W.; Thurston, T. R.

doi:10.1103/physrevb.52.3555

Cited by 41 publications

(31 citation statements)

References 17 publications

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“…Transition metal sulfides such as copper sulfides [2,3], ferric sulfides [4,5], cobalt sulfides [6e8] and nickel sulfides [9e13] have been actively investigated as possible candidates for anode materials due to their high capacity, low cost and eco-friendliness. Among the family of transition metal sulfides, nickel sulfides have caused a special attention due to their interesting electronic, magnetic, optical properties [14,15] and their multiple potential applications including LIBs [9e13], supercapacitors [16e18] and catalysts [19,20]. It was reported that the various phases of nickel sulfides such as NiS [9], Ni 3 S 2 [10,11], Ni 3 S 4 [12], Ni 7 S 6 [13] exhibited higher specific capacity as anode materials of LIBs compared to graphite anode material.…”

Section: Introductionsmentioning

confidence: 99%

l-Cysteine-assisted hydrothermal synthesis of nickel disulfide/graphene composite with enhanced electrochemical performance for reversible lithium storage

Chen

et al. 2015

Journal of Power Sources

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Section: Introductionsmentioning

confidence: 99%

l-Cysteine-assisted hydrothermal synthesis of nickel disulfide/graphene composite with enhanced electrochemical performance for reversible lithium storage

Chen

et al. 2015

Journal of Power Sources

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“…The magnetostrictive response of the lattice to M2 is likely rhombohedral 19 and the distortion from cubic symmetry is extremely small, with a relative lattice constant change ∆a/a ∼ 2 × 10 −4 (Ref. [20]).…”

Section: Antiferromagnetism At Ambient and High Pressuresmentioning

confidence: 99%

Magnetism, structure, and charge correlation at a pressure-induced Mott-Hubbard insulator-metal transition

et al. 2011

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We use synchrotron x-ray diffraction and electrical transport under pressure to probe both the magnetism and the structure of single crystal NiS2 across its Mott-Hubbard transition. In the insulator, the low-temperature antiferromagnetic order results from superexchange among correlated electrons and couples to a (1/2, 1/2, 1/2) superlattice distortion. Applying pressure suppresses the insulating state, but enhances the magnetism as the superexchange increases with decreasing lattice constant. By comparing our results under pressure to previous studies of doped crystals we show that this dependence of the magnetism on the lattice constant is consistent for both band broadening and band filling. In the high pressure metallic phase the lattice symmetry is reduced from cubic to monoclinic, pointing to the primary influence of charge correlations at the transition. There exists a wide regime of phase separation that may be a general characteristic of correlated quantum matter.

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“…At T N 2 the type II AF structure appears in addition to the type I structure. This is accompanied by the rhombohedral distortion and with the mysterious WF [21]. This lattice distortion (d > 0) lifts the quasidegeneracy of type I and type II structures [30].…”

Section: Shown Inmentioning

confidence: 99%

“…Experimentally anomalous behaviors in the fcc AF are often observed. For example there occurs mysterious weak ferromagnetism (WF) in NiS 2 below the second AF transition temperature T N 2 [21]. The Hall effect in this material is also large and strongly temperature dependent [22].…”

mentioning

confidence: 99%

Orbital Ferromagnetism and Anomalous Hall Effect in Antiferromagnets on the Distorted fcc Lattice

Shindou

Nagaosa²

2001

Phys. Rev. Lett.

285

293

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The Berry phase due to the spin wavefunction gives rise to the orbital ferromagnetism and anomalous Hall effect in the non-coplanar antiferromagnetic ordered state on face-centered-cubic (fcc) lattice once the crystal is distorted perpendicular to (1,1,1) or (1,1,0)-plane. The relevance to the real systems γ-FeMn and NiS2 is also discussed.PACS numbers: 11.30. Er, 11.30.Rd, 71.27.+a It has been recognized for a long term that the chirality plays important roles in the physics of frustrated spin systems [1][2][3][4][5][6]. These degrees of freedom are distinct from the (staggered) magnetization, and could show phase transition without magnetic ordering [1][2][3]. Especially since the discovery of the high-Tc cuprates, the scalar spin chiralityhas been a key theoretical concept in the physics of strongly correlated electronic systems [4][5][6]. This spin chirality acts as the gauge flux for the charge carriers moving in the background of the fluctuating spins. In order for the spin chirality χ ijk to be ordered, both the time-reversal (T) and parity (P) symmetries must be broken. Broken T and P symmetries in 2D bring about many intriguing physics such as parity anomaly [7,8] , anyon superconductivity [9], and quantized Hall effect without external magnetic field [10]. A physical realization of the last one has been discussed [11] in the context of anomalous Hall effect (AHE) in ferromagnets via the spin chirality mechanism [12][13][14][15]. In this paper we explore the chiral spin state in the ordered antiferromagnet (AF) on the three-dimensional face-centered-cubic (fcc) lattice. The AF on the fcc lattice is a typical frustrated system, and nontrivial spin structure with the finite spin chirality in eq. (1) is expected. For example, in the charge transfer (CT) insulator NiS 2 [16] and in the metallic alloy γ-FeMn [17] the non-coplanar spin structure (so-called triple-Q structure shown in Fig. 1a) has been observed. A theoretical explanation for this structure is the following. Let us consider the case where the lattice points are divided into 4-sublattices as shown in Fig. 1a. Denoting the (classical) spin moment at each sublattice as S a (a = 1, 2, 3, 4), the 2-spin exchange interaction energy is written as H 2 ∝ ( a=1,4 S a )2 . Therefore the condition of the lowest energy a=1,4 S a = 0 does not determine the spin structure and leaves many degenerate lowest energy configurations. Then the interactions which lift this degeneracy such as the 4-spin exchange interaction become important [18,19]. In paticular the phenomenological Ginzburg-Landau theory for the 4-spin exchange interaction is given as H 4 = J 4 a =b ( S a · S b ) 2[19]. With positive J 4 , the ground state configuration is given by S 1 = (

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Surface and bulk magnetic properties of pyriteNiS2: Magnetization and neutron-scattering studies

Cited by 41 publications

References 17 publications

l-Cysteine-assisted hydrothermal synthesis of nickel disulfide/graphene composite with enhanced electrochemical performance for reversible lithium storage

l-Cysteine-assisted hydrothermal synthesis of nickel disulfide/graphene composite with enhanced electrochemical performance for reversible lithium storage

Magnetism, structure, and charge correlation at a pressure-induced Mott-Hubbard insulator-metal transition

Orbital Ferromagnetism and Anomalous Hall Effect in Antiferromagnets on the Distorted fcc Lattice

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