O17 and V51 NMR for the zigzag spin-1 chain compound Ca V2 O4

X. Zong; B. J. Suh; A. Niazi; J. Q. Yan; D. L. Schlagel; T. A. Lograsso; D. C. Johnston

doi:10.1103/PhysRevB.77.014412

O17 and V51 NMR for the zigzag spin-1 chain compound Ca V2 O4

X. Zong, B. J. Suh, A. Niazi, J. Q. Yan, D. L. Schlagel, T. A. Lograsso, D. C. Johnston

Research output: Contribution to journal › Article › peer-review

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Abstract

V51 NMR studies on Ca V2 O4 single crystals and O17 NMR studies on O17 -enriched powder samples are reported. The temperature dependences of the O17 NMR linewidth and nuclear spin-lattice relaxation rate give strong evidence for a long-range antiferromagnetic transition at TN =78 K in the powder. Magnetic susceptibility measurements show that TN =69 K in the crystals. A zero-field V51 NMR signal was observed at low temperatures (f≈237 MHz at 4.2 K) in the crystals. The field-swept spectra with the field in different directions suggest the presence of two antiferromagnetic substructures. Each substructure is collinear, with the easy axes of the two substructures separated by an angle of 19(1)°, and with their average direction pointing approximately along the b axis of the crystal structure. The two spin substructures contain equal numbers of spins. The temperature dependence of the ordered moment, measured up to 45 K, shows the presence of an energy gap EG in the antiferromagnetic spin wave excitation spectrum. Antiferromagnetic spin wave theory suggests that EG/kB lies between 64 and 98 K.

Original language	English
Article number	014412
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	77
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevB.77.014412
State	Published - Jan 10 2008
Externally published	Yes

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title = "O17 and V51 NMR for the zigzag spin-1 chain compound Ca V2 O4",

abstract = "V51 NMR studies on Ca V2 O4 single crystals and O17 NMR studies on O17 -enriched powder samples are reported. The temperature dependences of the O17 NMR linewidth and nuclear spin-lattice relaxation rate give strong evidence for a long-range antiferromagnetic transition at TN =78 K in the powder. Magnetic susceptibility measurements show that TN =69 K in the crystals. A zero-field V51 NMR signal was observed at low temperatures (f≈237 MHz at 4.2 K) in the crystals. The field-swept spectra with the field in different directions suggest the presence of two antiferromagnetic substructures. Each substructure is collinear, with the easy axes of the two substructures separated by an angle of 19(1)°, and with their average direction pointing approximately along the b axis of the crystal structure. The two spin substructures contain equal numbers of spins. The temperature dependence of the ordered moment, measured up to 45 K, shows the presence of an energy gap EG in the antiferromagnetic spin wave excitation spectrum. Antiferromagnetic spin wave theory suggests that EG/kB lies between 64 and 98 K.",

author = "X. Zong and Suh, {B. J.} and A. Niazi and Yan, {J. Q.} and Schlagel, {D. L.} and Lograsso, {T. A.} and Johnston, {D. C.}",

year = "2008",

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doi = "10.1103/PhysRevB.77.014412",

language = "English",

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journal = "Physical Review B - Condensed Matter and Materials Physics",

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publisher = "American Physical Society",

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TY - JOUR

T1 - O17 and V51 NMR for the zigzag spin-1 chain compound Ca V2 O4

AU - Zong, X.

AU - Suh, B. J.

AU - Niazi, A.

AU - Yan, J. Q.

AU - Schlagel, D. L.

AU - Lograsso, T. A.

AU - Johnston, D. C.

PY - 2008/1/10

Y1 - 2008/1/10

N2 - V51 NMR studies on Ca V2 O4 single crystals and O17 NMR studies on O17 -enriched powder samples are reported. The temperature dependences of the O17 NMR linewidth and nuclear spin-lattice relaxation rate give strong evidence for a long-range antiferromagnetic transition at TN =78 K in the powder. Magnetic susceptibility measurements show that TN =69 K in the crystals. A zero-field V51 NMR signal was observed at low temperatures (f≈237 MHz at 4.2 K) in the crystals. The field-swept spectra with the field in different directions suggest the presence of two antiferromagnetic substructures. Each substructure is collinear, with the easy axes of the two substructures separated by an angle of 19(1)°, and with their average direction pointing approximately along the b axis of the crystal structure. The two spin substructures contain equal numbers of spins. The temperature dependence of the ordered moment, measured up to 45 K, shows the presence of an energy gap EG in the antiferromagnetic spin wave excitation spectrum. Antiferromagnetic spin wave theory suggests that EG/kB lies between 64 and 98 K.

AB - V51 NMR studies on Ca V2 O4 single crystals and O17 NMR studies on O17 -enriched powder samples are reported. The temperature dependences of the O17 NMR linewidth and nuclear spin-lattice relaxation rate give strong evidence for a long-range antiferromagnetic transition at TN =78 K in the powder. Magnetic susceptibility measurements show that TN =69 K in the crystals. A zero-field V51 NMR signal was observed at low temperatures (f≈237 MHz at 4.2 K) in the crystals. The field-swept spectra with the field in different directions suggest the presence of two antiferromagnetic substructures. Each substructure is collinear, with the easy axes of the two substructures separated by an angle of 19(1)°, and with their average direction pointing approximately along the b axis of the crystal structure. The two spin substructures contain equal numbers of spins. The temperature dependence of the ordered moment, measured up to 45 K, shows the presence of an energy gap EG in the antiferromagnetic spin wave excitation spectrum. Antiferromagnetic spin wave theory suggests that EG/kB lies between 64 and 98 K.

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U2 - 10.1103/PhysRevB.77.014412

DO - 10.1103/PhysRevB.77.014412

M3 - Article

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SN - 1098-0121

VL - 77

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

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M1 - 014412

ER -

O17 and V51 NMR for the zigzag spin-1 chain compound Ca V2 O4

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