59Co NMR in Co2+ ion at tetrahedral site

Tsuda, Teruhisa; Hirai, Akira; Abe, Hisashi

doi:10.1016/0375-9601(68)90790-1

Cited by 17 publications

(15 citation statements)

References 13 publications

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“…Here we present a similar discussion as shown in the previous papers. [212,202] The major contributions to the magnetic hyperfine coupling constant at the 59 χ VV is estimated to be 4(2) × 10 −4 cm 3 /mol which is in good agreement with T -independent magnetic susceptibility [191].…”

Section: Nuclear Magnetic Resonance Measurements : 59 Co-nmrsupporting

confidence: 71%

Low-temperature nuclear magnetic resonance investigation of systems frustrated by competing exchange interactions

Roy¹

2014

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Section: Nuclear Magnetic Resonance Measurements : 59 Co-nmrsupporting

confidence: 71%

Low-temperature nuclear magnetic resonance investigation of systems frustrated by competing exchange interactions

Roy¹

2014

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“…At present, the reason for the small internal field at the V sites in VI 3 is not clear. One possible explanation is that positive contributions of orbital and/or dipolar hyperfine couplings partially cancel the negative core polarization hyperfine field, as discussed previously [35][36][37][38] .…”

Section: A Magnetism At Ambient Pressurementioning

confidence: 93%

“…u . )Temperature-dependent specific heat, C/T , and magnetization data, M , of VI3 at different pressures for 0.6 GPa ≤ p < 1 35.…”

mentioning

confidence: 99%

Multiple ferromagnetic transitions and structural distortion in the van der Waals ferromagnetVI3at ambient and finite pressures

et al. 2019

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We present a combined study of zero-field 51 V and 127 I NMR at ambient pressure and specific heat and magnetization measurements under pressure up to 2.08 GPa on bulk single crystals of the van-der-Waals ferromagnet VI3. At ambient pressure, our results consistently demonstrate that VI3 undergoes a structural transition at Ts ≈ 78 K, followed by two subsequent ferromagnetic transitions at TF M 1 ≈ 50 K and TF M 2 ≈ 36 K upon cooling. At lowest temperature (T < TF M 2), two magnetically-ordered V sites exist, whereas only one magnetically-ordered V site is observed for TF M 1 < T < TF M 2. Whereas TF M 1 is almost unaffected by external pressure, TF M 2 is highly responsive to pressure and merges with the TF M 1 line at p ≈ 0.6 GPa. At even higher pressures (p ≈ 1.25 GPa), the TF M 2 line merges with the structural transition at Ts which becomes moderately suppressed with p for p < 1.25 GPa. Taken together, our data point towards a complex magnetic structure and an interesting interplay of magnetic and structural degrees of freedom in VI3. PACS numbers: xxxarXiv:1907.08550v1 [cond-mat.str-el]

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“…Here we present a similar discussion as in the previous papers. 18,19 The major contributions to the magnetic hyperfine coupling constant at the 59 Co nucleus are dominated by the d core polarization (A core hf ), dipolar (A dip hf ) and orbital (A orb hf ) terms: [18][19][20] A hf = A core hf + A dip hf + A orb hf .…”

Section: B 59 Co-nmrmentioning

confidence: 99%

Experimental evidence of a collinear antiferromagnetic ordering in the frustrated CoAl2O4spinel

et al. 2013

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Nuclear magnetic resonance (NMR), neutron diffraction (ND), x-ray diffraction, magnetic susceptibility χ and specific heat measurements on the frustrated A-site spinel CoAl2O4 compound reveal a collinear antiferromagnetic ordering below TN = 9.8(2) K. A high quality powder sample characterized by x-ray diffraction that indicates a relatively low Co-Al inversion parameter x = 0.057 (20) in (Co1−xAlx)[Al2−xCox]O4, shows a broad maximum around 15 K in χ(T ) and a sharp peak at TN in heat capacity Cp. The average ordered magnetic moment of Co 2+ (S = 3/2) ions at the A-site is estimated to be 2.4(1) µB from NMR and 1.9(5) µB from ND which are smaller than the expected value of 3 µB for S = 3/2 and g = 2. Antiferromagnetic spin fluctuations and correlations in the paramagnetic state are revealed from the χ, NMR and ND measurements, which are due to spin frustration and site inversion effects in the system. The ND data also show short-range dynamic magnetic ordering that persists to a temperature that is almost twice TN.

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59Co NMR in Co2+ ion at tetrahedral site

Cited by 17 publications

References 13 publications

Low-temperature nuclear magnetic resonance investigation of systems frustrated by competing exchange interactions

Low-temperature nuclear magnetic resonance investigation of systems frustrated by competing exchange interactions

Multiple ferromagnetic transitions and structural distortion in the van der Waals ferromagnetVI3at ambient and finite pressures

Experimental evidence of a collinear antiferromagnetic ordering in the frustrated CoAl2O4spinel

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