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Kitani, Suguru; Tachibana, Makoto; Taira, Naoya; Kawaji, Hitoshi

doi:10.1103/physrevb.87.064402

Cited by 22 publications

(20 citation statements)

References 47 publications

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“…1, all four compounds showed rapid volume contraction at around TN with decreasing temperature. Similar volume contractions have been reported in many Cr spinels with a uniform pyrochlore structure, 10,[30][31][32] indicating that the volume contraction at around TN with decreasing temperature appears regardless of the breathing. In the Cr spinel compounds, spin frustration is relieved by distorting the pyrochlore structure at low temperatures, resulting in antiferromagnetic order and structural distortion occurring simultaneously.…”

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confidence: 81%

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Thermal Expansion and Volume Magnetostriction in Breathing Pyrochlore Magnets LiACr₄X₈ (A = Ga, In, X = O, S)

et al. 2020

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We report thermal expansion and magnetostriction in breathing pyrochlore magnets LiACr4X8 (A = Ga, In, X = O, S) measured by a dilatometric method on sintered samples. All four of these compounds showed a large volume contraction associated with antiferromagnetic order with decreasing temperature. Above the Neél temperature, LiGaCr4S8 showed negative thermal expansion, LiInCr4O8 showed positive thermal expansion with concave-downward temperature dependence, and LiInCr4S8 showed positive forced volume magnetostriction. All these phenomena are likely caused by the complex structure-magnetism correlation within the breathing pyrochlore structure with J and J'. These results suggested that breathing pyrochlore magnets are promising for the realization of various volumetric phenomena related to their magnetism not only in the magnetically-ordered phase but also in the paramagnetic phase.

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confidence: 81%

“…ZnCr2Se4 and CdCr2O4 were reported to show negative thermal expansion in a paramagnetic phase above TN. 10,30) Such a negative thermal expansion in a paramagnetic phase is expected to increase its upper temperature limit, which might open an avenue for finding novel negative thermal expansion materials for practical use.…”

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confidence: 99%

Thermal Expansion and Volume Magnetostriction in Breathing Pyrochlore Magnets LiACr₄X₈ (A = Ga, In, X = O, S)

et al. 2020

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“…187 These cubic spinels have been studied as magnetic frustrated systems and multifunctional solid compounds such as multiferroics. Due to this competition, NTE behaviour occurs at temperatures above T N where such competition coexists in ZnCr 2 Se 4 (a l = À3.6 Â 10 À6 K À1 , 21-40 K), 188,236,237 and CdCr 2 O 4 (a l = À1.4 Â 10 À6 K À1 , 45-140 K), 187 or in the ferromagnetic phase with relatively lower T C such as CdCr 2 S 4 (a l = À1.8 Â 10 À6 K À1 , 4.2-120 K). NTE has been found in those magnetic frustrated spinels due to the strong spin-lattice coupling.…”

Section: Nte Magnetic Oxides and Other Materialsmentioning

confidence: 99%

Negative thermal expansion in functional materials: controllable thermal expansion by chemical modifications

et al. 2015

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Negative thermal expansion (NTE) is an intriguing physical property of solids, which is a consequence of a complex interplay among the lattice, phonons, and electrons. Interestingly, a large number of NTE materials have been found in various types of functional materials. In the last two decades good progress has been achieved to discover new phenomena and mechanisms of NTE. In the present review article, NTE is reviewed in functional materials of ferroelectrics, magnetics, multiferroics, superconductors, temperature-induced electron configuration change and so on. Zero thermal expansion (ZTE) of functional materials is emphasized due to the importance for practical applications. The NTE functional materials present a general physical picture to reveal a strong coupling role between physical properties and NTE. There is a general nature of NTE for both ferroelectrics and magnetics, in which NTE is determined by either ferroelectric order or magnetic one. In NTE functional materials, a multi-way to control thermal expansion can be established through the coupling roles of ferroelectricity-NTE, magnetism-NTE, change of electron configuration-NTE, open-framework-NTE, and so on. Chemical modification has been proved to be an effective method to control thermal expansion. Finally, challenges and questions are discussed for the development of NTE materials. There remains a challenge to discover a "perfect" NTE material for each specific application for chemists. The future studies on NTE functional materials will definitely promote the development of NTE materials.

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“…This suggests that the NTE observed within the plateau phase of CdCr 2 O 4 , may have a qualitatively different origin from that observed in the paramagnetic phase in zero field. NTE in pyrochlore lattices is often attributed to strong spin-lattice coupling [13,30,31], but a general, microscopic theory is lacking. It is therefore interesting to explore the predictions of the microscopic model of spinlattice coupling, Eq.…”

mentioning

confidence: 99%

“…Fig. S1 shows the magnetostructural transition from the cubic Fd3m, paramagnetic phase to the tetragonal I4 1 /amd, antiferromagnetic phase on cooling through T N [31]. In the thermal expansion coefficient α ( Fig.…”

mentioning

confidence: 99%

Negative Thermal Expansion in the Plateau State of a Magnetically Frustrated Spinel

et al. 2019

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We report on negative thermal expansion (NTE) in the high-field, half-magnetization plateau phase of the frustrated magnetic insulator CdCr2O4. Using dilatometry, we precisely map the phase diagram at fields of up to 30 T, and identify a strong NTE associated with the collinear halfmagnetization plateau for B > 27 T. The resulting phase diagram is compared with a microscopic theory for spin-lattice coupling, and the origin of the NTE is identified as a large negative change in magnetization with temperature, coming from a nearly-localised band of spin excitations in the plateau phase. These results provide useful guidelines for the discovery of new NTE materials. arXiv:1812.05890v2 [cond-mat.str-el]

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Thermal study of the interplay between spin and lattice in CoCr2O4and CdCr2O
Suguru Kitani
¹
,
Makoto Tachibana
²
,
Naoya Taira
³

et al.

Cited by 22 publications

References 47 publications

Thermal Expansion and Volume Magnetostriction in Breathing Pyrochlore Magnets LiACr₄X₈ (A = Ga, In, X = O, S)

Thermal Expansion and Volume Magnetostriction in Breathing Pyrochlore Magnets LiACr₄X₈ (A = Ga, In, X = O, S)

Negative thermal expansion in functional materials: controllable thermal expansion by chemical modifications

Negative Thermal Expansion in the Plateau State of a Magnetically Frustrated Spinel

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Thermal study of the interplay between spin and lattice in CoCr2O4and CdCr2OSuguru Kitani1, Makoto Tachibana2, Naoya Taira3 et al.

Cited by 22 publications

References 47 publications

Thermal Expansion and Volume Magnetostriction in Breathing Pyrochlore Magnets LiACr4X8 (A = Ga, In, X = O, S)

Thermal Expansion and Volume Magnetostriction in Breathing Pyrochlore Magnets LiACr4X8 (A = Ga, In, X = O, S)

Negative thermal expansion in functional materials: controllable thermal expansion by chemical modifications

Negative Thermal Expansion in the Plateau State of a Magnetically Frustrated Spinel

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Product

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About

Thermal study of the interplay between spin and lattice in CoCr2O4and CdCr2O
Suguru Kitani
¹
,
Makoto Tachibana
²
,
Naoya Taira
³

et al.

Thermal Expansion and Volume Magnetostriction in Breathing Pyrochlore Magnets LiACr₄X₈ (A = Ga, In, X = O, S)

Thermal Expansion and Volume Magnetostriction in Breathing Pyrochlore Magnets LiACr₄X₈ (A = Ga, In, X = O, S)