Field-induced magnetic ordering in uniaxial nickel systems: A second example

Paduan-Filho, A.; Chirico, Robert D.; Joung, Kyong O.; Carlin, Richard L.

doi:10.1063/1.441589

Cited by 41 publications

(40 citation statements)

References 14 publications

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“…There are several other reports on Ni based compounds. A magnetization measurement 26) was performed for NiCl 2 ·SC(NH 2 ) 2 . Later, heat capacity measurements on Ni(…”

Section: 2)mentioning

confidence: 99%

Critical Properties of Condensation of Field-Induced Triplet Quasiparticles

Kawashima

2005

J. Phys. Soc. Jpn.

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“…There are several other reports on Ni based compounds. A magnetization measurement 26) was performed for NiCl 2 ·SC(NH 2 ) 2 . Later, heat capacity measurements on Ni(…”

Section: 2)mentioning

confidence: 99%

Critical Properties of Condensation of Field-Induced Triplet Quasiparticles

Kawashima

2005

J. Phys. Soc. Jpn.

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“…The Ni S = 1 spin triplet is split by single-ion anisotropy into a S z = 0 ground state and S z = ±1 excited states with an energy gap of D ∼ 10 K. 10,11,12 The S z = ±1 levels are dispersed by the antiferromagnetic coupling J, e.g. the spins can have different energies depending on their orientation with respect to each other.…”

Section: Introductionmentioning

confidence: 99%

Magnetostriction in the Bose-Einstein condensate quantum magnet NiCl2–4SC(NH2)2 (Invited)

Zapf

Correa²,

Batista

et al. 2007

Journal of Applied Physics

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The quantum magnet NiCl2-4SC(NH2)2 is a candidate for observing Bose-Einstein Condensation of spin degrees of freedom in applied magnetic fields. An XY antiferromagnetic ordered state occurs in a dome-shaped region of the temperature-field phase diagram between Hc1 = 2.1 T and Hc2 = 12.6 T and below 1.2 K. BEC corresponds to the field-induced quantum phase transition into the ordered state. We investigate magnetostriction in single crystals of this compound at dilution refrigerator temperatures in magnetic fields up to 18 T, and as a function of magnetic field angle. We show that significant changes in the lattice parameters are induced by magnetic fields, and argue that these result from antiferromagnetic couplings between the Ni spins along the tetragonal c-axis. The magnetic phase diagram as a function of temperature, field, and field angle can be extracted from these data. We discuss the implications of these results to Bose-Einstein Condensation in this system.

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“…The NiCl 2 -4SC(NH 2 ) 2 (DTN) compound [1], consisting of weakly coupled chains of S = 1 (Ni-ion) spins with an easy-plane single-ion anisotropy (D), is one of the most studied quantum spin materials [2]. Between the two critical magnetic fields H c1 and H c2 , it presents a magnetic-field-induced low-temperature (T ) 3D-ordered phase, described as a Bose-Einstein condensate (BEC) [2][3][4][5].…”

mentioning

confidence: 99%

Nuclear Magnetic Resonance Reveals Disordered Level-Crossing Physics in the Bose-Glass Regime of the Br-Doped Ni(Cl1−xBrx
Orlova
¹
,
Blinder
²
,
Kermarrec
³

et al. 2017
Phys. Rev. Lett.
15
2
39
0
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By measuring the nuclear magnetic resonance (NMR) T −1 1 relaxation rate in the Br (bond) doped DTN compound, Ni(Cl1−xBrx)2-4SC(NH2)2 (DTNX), we show that the low-energy spin dynamics of its high magnetic field "Bose-glass" regime is dominated by a strong peak of spin fluctuations found at the nearly doping-independent position H * ∼ = 13.6 T. From its temperature and field dependence we conclude that this corresponds to a level crossing of the energy levels related to the doping-induced impurity states. Observation of the local NMR signal from the spin adjacent to the doped Br allowed us to fully characterize this impurity state. We have thus quantified a microscopic theoretical model that paves the way to better understanding of the Bose-glass physics in DTNX, as revealed in the related theoretical study [M. Dupont, S. Capponi, and N. Laflorencie, Phys. Rev. Lett. 118, 067204 (2017) The NiCl 2 -4SC(NH 2 ) 2 (DTN) compound [1], consisting of weakly coupled chains of S = 1 (Ni-ion) spins with an easy-plane single-ion anisotropy (D), is one of the most studied quantum spin materials [2]. Between the two critical magnetic fields H c1 and H c2 , it presents a magnetic-field-induced low-temperature (T ) 3D-ordered phase, described as a Bose-Einstein condensate (BEC) [2][3][4][5]. DTN is particularly convenient for studying this phase; for a magnetic field (H) applied along the chain c axis, its (body-centered) tetragonal symmetry [6] ensures the required axial symmetry of the spin Hamiltonian with respect to H. The values of its exchange couplings and [7,8] make the BEC phase easily accessible, with H c2 = 12.32 T [9-11] and the phase transition temperature T c below T cmax = 1.2 K. The system can be reasonably considered as quasi-one-dimensional (1D), with J a,b /J c = 0.08.Br-doped DTN, Ni(Cl 1−x Br x ) 2 -4SC(NH 2 ) 2 (DTNX), allows studying the effect of a bond disorder, which may lead to the appearance of a localized Bose-glass (BG) phases adjacent to the (now inhomogeneous) BEC phase [12], as suggested from the thermodynamic measurements [13]. The BG state, first discussed for quantum wires [14] and superfluid 4 He absorbed in porous media [15,16], remains elusive, with only a few experimental examples [17][18][19][20], particularly rare for condensed-matter systems in the thermodynamic limit [21], such as DTNX [13].We present here the first microscopic information on the high-field (H > H c2 ) disordered state in DTNX, where the low-energy spin fluctuations (dynamics) are measured by 1 H and 14 N nuclear spin-lattice relaxation rate (T −1 1 ), while the NMR spectra revealed the local spin polarization [22]. As compared to pure DTN, the main feature of spin dynamics in DTNX is a peak of T −1 1 appearing at H * ∼ = 13.6 T independently of the doping level. This is attributed to the level crossing of singleparticle states strongly localized at the doped-bond position, which is then somewhat distributed/disordered by the mutual interaction of these states. The disorder is seen by NMR as the inhomogeneous relaxat...

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Field-induced magnetic ordering in uniaxial nickel systems: A second example

Cited by 41 publications

References 14 publications

Critical Properties of Condensation of Field-Induced Triplet Quasiparticles

Critical Properties of Condensation of Field-Induced Triplet Quasiparticles

Magnetostriction in the Bose-Einstein condensate quantum magnet NiCl2–4SC(NH2)2 (Invited)

Nuclear Magnetic Resonance Reveals Disordered Level-Crossing Physics in the Bose-Glass Regime of the Br-Doped Ni(Cl1−xBrx
Orlova
¹
,
Blinder
²
,
Kermarrec
³

et al. 2017
Phys. Rev. Lett.
15
2
39
0
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Field-induced magnetic ordering in uniaxial nickel systems: A second example

Cited by 41 publications

References 14 publications

Critical Properties of Condensation of Field-Induced Triplet Quasiparticles

Critical Properties of Condensation of Field-Induced Triplet Quasiparticles

Magnetostriction in the Bose-Einstein condensate quantum magnet NiCl2–4SC(NH2)2 (Invited)

Nuclear Magnetic Resonance Reveals Disordered Level-Crossing Physics in the Bose-Glass Regime of the Br-Doped Ni(Cl1−xBrxOrlova1, Blinder2, Kermarrec3 et al. 2017Phys. Rev. Lett.152390View full textAdd to dashboardCite

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Nuclear Magnetic Resonance Reveals Disordered Level-Crossing Physics in the Bose-Glass Regime of the Br-Doped Ni(Cl1−xBrx
Orlova
¹
,
Blinder
²
,
Kermarrec
³

et al. 2017
Phys. Rev. Lett.
15
2
39
0
View full text Add to dashboard Cite