Magnetization Process of Atacamite: A Case of Weakly Coupled 
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 Sawtooth Chains

Heinze, L.; Jeschke, Harald O.; Mazin, I. I.; Metavitsiadis, Alexandros; Reehuis, M.; Feyerherm, R.; Hoffmann, J.-U.; Bartkowiak, Maciej; Prokhnenko, O.; Wolter, A. U. B.; Ding, Xiaxin; Zapf, Vivien; Moya, Carolina Corvalán; Weickert, Franziska; Jaime, M.; Rule, K. C.; Menzel, D.; Valentí, Roser; Brenig, Wilhelm; Süllow, S.

doi:10.1103/physrevlett.126.207201

Cited by 24 publications

(26 citation statements)

References 60 publications

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“…The canting angle between magnetic moments is much smaller than those in the other sawtooth chain magnets 18 , 22 . This suggests that a single-ion anisotropy is small and antiferromagnetic exchange couplings favor the magnetic structure with the small noncollinearity.…”

Section: Discussionmentioning

confidence: 68%

“…Several compounds were reported to have a magnetic sawtooth chain such as 15 , 16 , ( )(OH) 3 O 17 , Cl(OH) 18 , {[Cu(bpy)( O)][Cu(bpy)(mal)( O)]}( ) (bpy = 2,2’-bipyridine and mal = malonate dianion) 19 , 20 , (Ln = Er, Tm, Yb) 21 and O( ) 22 . In this article, we discuss magnetic properties of a sawtooth chain magnet 23 – 25 .…”

Section: Introductionmentioning

confidence: 99%

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Magnetic structure study of the sawtooth chain antiferromagnet $$\hbox {Fe}_2\hbox {Se}_2\hbox {O}_7$$

Nawa

Avdeev

Berdonosov

et al. 2021

Sci Rep

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A magnetic structure of the sawtooth-chain antiferromagnet $$\hbox {Fe}_2\hbox {Se}_2\hbox {O}_7$$ Fe 2 Se 2 O 7 was investigated by magnetization measurements, single crystalline and powder neutron diffraction experiments, and a further analysis on the Mössbauer spectra. These experiments revealed a nearly collinear antiferromagnetic structure with magnetic moments aligned along the b-axis, indicating dominant antiferromagnetic exchanges between Fe(1)–Fe(2) and Fe(2)–Fe(3) sites. The magnon dispersion relation derived from the linear spin wave approximation suggests the possible flat band nature of magnons.

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Section: Discussionmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Magnetic structure study of the sawtooth chain antiferromagnet $$\hbox {Fe}_2\hbox {Se}_2\hbox {O}_7$$

Nawa

Avdeev

Berdonosov

et al. 2021

Sci Rep

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show abstract

“…1). The sawtooth spin chain is a paradigmatic frustrated quantum spin model that can serve as the relevant spin model for various magnetic compounds [105][106][107][108][109][110][111][112]. However, the discussed electric-field driven flat-band physics also exists for more general sawtoothchain models, e.g.…”

Section: Discussionmentioning

confidence: 99%

“…While the parameter situation in the former one is not very close to the flat-band point, the Fe 10 Gd 10 molecule exhibits exchange parameters close to the flat-band point [107], and, therefore signatures of flatband physics are well seen in this system [103,104,107]. Further examples for magnetic compounds with sawtooth chain geometry of exchange bonds are the atacamite Cu 2 Cl(OH) 3 [108], the fluoride Cs 2 LiTi 3 F 12 [109], the euchroite Cu 2 (AsO 4 )(OH)•3H 2 O [110], the sawtooth spin ring Mo 75 V 20 [111] or a frustrated [Mn 18 ] magnetic wheel-of-wheels molecule [112].…”

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confidence: 99%

Electric field driven flat bands: Enhanced magnetoelectric and electrocaloric effects in frustrated quantum magnets

Richter,

Ohanyan,

Schulenburg

et al. 2021

Preprint

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The J1-J2 quantum spin sawtooth chain is a paradigmatic one-dimensional frustrated quantum spin system exhibiting unconventional ground-state and finite-temperature properties. In particular, it exhibits a flat energy band of one-magnon excitations accompanied by an enhanced magnetocaloric effect for two singular ratios of the basal interactions J1 and the zigzag interactions J2. In our paper, we demonstrate that one can drive the spin system into a flat-band scenario by applying an appropriate electric field, thus overcoming the restriction of fine-tuned exchange couplings J1 and J2 and allowing one to tune more materials towards flat-band physics, that is to show a macroscopic magnetization jump when crossing the magnetic saturation field, a residual entropy at zero temperature as well as an enhanced magnetocaloric effect. While the magnetic field acts on the spin system via the ordinary Zeeman term, the coupling of an applied electric field with the spins is given by the sophisticated Katsura-Nagaosa-Balatsky (KNB) mechanism, where the electric field effectively acts as a Dzyaloshinskii-Moriya spin-spin interaction. The resulting novel features are corresponding reciprocal effects: We find a magnetization jump driven by the electric field as well as a jump of the electric polarization driven by the magnetic field, i.e. the system exhibits an extraordinarily strong magnetoelectric effect. Moreover, in analogy to the enhanced magnetocaloric effect the system shows an enhanced electrocaloric effect.

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“…On the other hand, there are several solid-state realizations of these models, see Refs. [33,[45][46][47][48][49][50][51] (see also [52]) and Refs. [53][54][55].…”

Section: Introductionmentioning

confidence: 99%

Quantum Heisenberg model on a sawtooth-chain lattice: rotation-invariant Green’s function method

et al. 2022

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We apply the rotation-invariant Green's function method (RGM) to study the spin S = 1/2 Heisenberg model on a one-dimensional sawtooth lattice, which has two nonequivalent sites in the unit cell. We check the RGM predictions for observable quantities by comparison with the exactdiagonalization and finite-temperature-Lanczos calculations. We discuss the thermodynamic and dynamic properties of this model in relation to the mineral atacamite Cu2Cl(OH)3 complementing the RGM outcomes by results of other approaches.

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Magnetization Process of Atacamite: A Case of Weakly Coupled S=1/2 Sawtooth Chains

Cited by 24 publications

References 60 publications

Magnetic structure study of the sawtooth chain antiferromagnet $$\hbox {Fe}_2\hbox {Se}_2\hbox {O}_7$$

Magnetic structure study of the sawtooth chain antiferromagnet $$\hbox {Fe}_2\hbox {Se}_2\hbox {O}_7$$

Electric field driven flat bands: Enhanced magnetoelectric and electrocaloric effects in frustrated quantum magnets

Quantum Heisenberg model on a sawtooth-chain lattice: rotation-invariant Green’s function method

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