2011
DOI: 10.1103/physrevlett.106.247202
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Magnetostructural Transitions in a Frustrated Magnet at High Fields

Abstract: Ultrasound and magnetization studies of bond-frustrated ZnCr2S4 spinel are performed in static magnetic fields up to 18 T and in pulsed fields up to 62 T. At temperatures below the antiferromagnetic transition at TN1 ≈ 14 K the sound velocity as function of magnetic field reveals a sequence of steps followed by plateaus indicating a succession of crystallographic structures with constant stiffness. At the same time, the magnetization evolves continuously with field up to full magnetic polarization without any … Show more

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Cited by 27 publications
(27 citation statements)
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“…In this bond-frustrated material, below the antiferromagnetic transition at 1 14 N T ≈ K, the sound velocity reveals a sequence of steps followed by plateaus as a function of magnetic field evidencing a succession of crystallographic structures with constant stiffness (Fig. 13) [38]. The magnetization, on the other hand increases smoothly with field up to saturation without any plateaus (Fig.…”
Section: Frustrated Antiferromagnetsmentioning
confidence: 92%
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“…In this bond-frustrated material, below the antiferromagnetic transition at 1 14 N T ≈ K, the sound velocity reveals a sequence of steps followed by plateaus as a function of magnetic field evidencing a succession of crystallographic structures with constant stiffness (Fig. 13) [38]. The magnetization, on the other hand increases smoothly with field up to saturation without any plateaus (Fig.…”
Section: Frustrated Antiferromagnetsmentioning
confidence: 92%
“…In external magnetic fields the oxide spinels show magnetization plateaus with a spin configuration having three spins up and one spin down for each tetrahedron, whereas the magnetization in ZnCr 2 S 4 and ZnCr 2 Se 4 increases rather smoothly with field (see, for instance, Fig. 13, lower panel) [38,39]. Strong spin-phonon coupling leads to a rich variety of spin-lattice effects including magnetostructural phase transitions.…”
Section: Frustrated Antiferromagnetsmentioning
confidence: 99%
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“…For transition-metal monoxides (TMMOs) a magnetisminduced anisotropy in the lattice response was predicted theoretically [6]. This approach has been extended to other material classes such as Cr based spinels, which are hallmark systems for highly frustrated magnets [7][8][9][10], where spin-phonon coupling leads to a splitting of characteristic phonon modes [11][12][13][14][15].…”
mentioning
confidence: 99%
“…For transition-metal monoxides (TMMOs) a magnetisminduced anisotropy in the lattice response was predicted theoretically [6]. This approach has been extended to other material classes such as Cr based spinels, which are hallmark systems for highly frustrated magnets [7][8][9][10], where spin-phonon coupling leads to a splitting of characteristic phonon modes [11][12][13][14][15].TMMOs are both textbook examples for antiferromagnets governed by superexchange in a cubic rock-salt lattice and benchmark materials for the understanding of strongly correlated electronic systems [16,17]. The magnetic structure of the TMMOs consists of ferromagnetic planes coupled antiferromagnetically, e.g., along [1 1 1] as depicted in Fig.…”
mentioning
confidence: 99%