NMR study of field-induced magnetic ordering in the Haldane system

Hashi, Kenjiro; Tsujii, Naohito; Shimizu, Tadashi; Goto, Atsushi; Kitazawa, Hideaki; Ohki, Shinobu

doi:10.1016/j.jmmm.2006.10.374

Cited by 2 publications

(4 citation statements)

References 9 publications

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“…However, the observed asymmetric broadening (which is analysed with a 2D model) may arise from Jahn-Teller lattice distortions in Mn 3+ O 6 octahedral sites of the doped compounds that create additional magnetic scattering (discussed later in detail). The values of the 2D correlation length (ξ 2D ) and 3D correlation length (ξ 3D ) were found to be 435 (15) and 20(2) Å, respectively. For the x = 0.05 compound, at the higher temperatures (T ≥ 155 K), the observed broad scattering profiles have been analysed using a Lorentzian function.…”

Section: Ir Basis Vectorsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

“…A pressure induced crossover from 2D to 3D magnetic correlations has been observed in La 1.4 Sr 1.6 Mn 2 O 7 manganite [12]. A field induced 3D magnetic ordering has been reported in quasi-1D spin-gap systems [13][14][15]. A strengthening of the 2D magnetic ordering has been observed with Ba substitution in layered oxysulfide (Sr, Ba) 2 Cu 2 CoO 2 S 2 due to an increase of the separation length between the magnetic CoO 2 layers, which arises because of the difference between the ionic radii of smaller Sr 2+ (1.26 Å) and larger Ba 2+ (1.42 Å) [16].…”

Section: Introductionmentioning

confidence: 99%

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Effect of electron doping on the magnetic correlations in the bilayered brownmillerite compound Ca_2.5−xLa_xSr_0.5GaMn₂O₈: a neutron diffraction study

Bera

Yusuf

Mirebeau

2011

J. Phys.: Condens. Matter

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The effect of electron doping on the magnetic properties of the Brownmillerite-type bilayered compounds has been investigated by neutron powder diffraction in La substituted Ca 2.5-x La x Sr 0.5 GaMn 2 O 8 compounds (x = 0.05 and 0.1), in comparison with the undoped compound (x = 0). In all compounds, a long-range three dimensional collinear antiferromagnetic (AFM) structure is found below the Néel temperature T N of respective compound, whereas, well above T N , three dimensional short-range magnetic ordering is observed. In the intermediate temperature range just above T N , a strong effect of electron doping (La substitution) on the magnetic correlations has been observed. Here, a short-range AFM correlation with possible dimensionality of three has been found for substituted compounds (x = 0.05 and 0.1) as compared to the reported two dimensional long-range AFM ordering in the parent compound. With increasing the electron doping, a decrease in T N is also observed. The short-range magnetic correlations set in over a large temperature range above T N . A magnetic phase diagram in the x-T plane is proposed from these results.

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Section: Ir Basis Vectorsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of electron doping on the magnetic correlations in the bilayered brownmillerite compound Ca_2.5−xLa_xSr_0.5GaMn₂O₈: a neutron diffraction study

Bera

Yusuf

Mirebeau

2011

J. Phys.: Condens. Matter

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“…A preliminary result at 30 T was reported. 24) In this paper we will report the detailed results of the NMR measurements above and below the critical field.…”

Section: Introductionmentioning

confidence: 99%

NMR Evidence for Field-induced Magnetic Ordering at 30 T in the Haldane Compound PbNi₂V₂O₈

et al. 2007

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51 V-NMR measurements of the Haldane compound PbNi 2 V 2 O 8 at 30 T have been performed by using a hybrid magnet installed at National Institute for Materials Science. The NMR spectrum begins to split at 12 K with decreasing temperature. The temperature at which the NMR spectrum begins to split well agrees with the temperature at which the magnetization takes the minimum. The splitting of the NMR spectrum gives microscopic evidence for the presence of the field-induced antiferromagnetic ordering. The splitting has grown uniformly with decreasing temperature, suggesting that the transition is of second order and the magnitude of the ordered moment is uniform. The upper limit of the magnitude of the ordered moment was estimated from dipole field calculations.

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NMR study of field-induced magnetic ordering in the Haldane system

Cited by 2 publications

References 9 publications

Effect of electron doping on the magnetic correlations in the bilayered brownmillerite compound Ca_2.5−xLa_xSr_0.5GaMn₂O₈: a neutron diffraction study

Effect of electron doping on the magnetic correlations in the bilayered brownmillerite compound Ca_2.5−xLa_xSr_0.5GaMn₂O₈: a neutron diffraction study

NMR Evidence for Field-induced Magnetic Ordering at 30 T in the Haldane Compound PbNi₂V₂O₈

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NMR study of field-induced magnetic ordering in the Haldane system

Cited by 2 publications

References 9 publications

Effect of electron doping on the magnetic correlations in the bilayered brownmillerite compound Ca2.5−xLaxSr0.5GaMn2O8: a neutron diffraction study

Effect of electron doping on the magnetic correlations in the bilayered brownmillerite compound Ca2.5−xLaxSr0.5GaMn2O8: a neutron diffraction study

NMR Evidence for Field-induced Magnetic Ordering at 30 T in the Haldane Compound PbNi2V2O8

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Effect of electron doping on the magnetic correlations in the bilayered brownmillerite compound Ca_2.5−xLa_xSr_0.5GaMn₂O₈: a neutron diffraction study

Effect of electron doping on the magnetic correlations in the bilayered brownmillerite compound Ca_2.5−xLa_xSr_0.5GaMn₂O₈: a neutron diffraction study

NMR Evidence for Field-induced Magnetic Ordering at 30 T in the Haldane Compound PbNi₂V₂O₈