NMR studies of ordered structures and valence states in the successive valence-transition system EuPtP

T. Mito; K. Nishitani; T. Koyama; H. Muta; T. Maruyama; G. Pristáš; K. Ueda; T. Kohara; A. Mitsuda; M. Sugishima; H. Wada

doi:10.1103/PhysRevB.90.195106

NMR studies of ordered structures and valence states in the successive valence-transition system EuPtP

T. Mito, K. Nishitani, T. Koyama, H. Muta, T. Maruyama, G. Pristáš, K. Ueda, T. Kohara, A. Mitsuda, M. Sugishima, H. Wada

Condensed Matter Physics

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3 Citations (Scopus)

Abstract

We have studied EuPtP, which undergoes two successive valence transitions at TA∼240 K and TB∼200 K by P31-nuclear magnetic resonance (NMR) measurements. From the analysis of NMR spectra, we obtained plausible ordered structures and Eu valence states in three phases divided by TA and TB. These ordered structures well explain observed inequivalent P sites and the intensity ratio of the NMR spectra arising from these P sites. The results are also in good accordance with mean Eu valence measured by the x-ray absorption spectroscopy. We also discuss Eu 4f states and the origin of the transitions from the measurements of nuclear spin lattice relaxation rate and hyperfine coupling constant.

Original language	English
Article number	195106
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	90
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevB.90.195106
Publication status	Published - Nov 4 2014

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.90.195106

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Mito, T., Nishitani, K., Koyama, T., Muta, H., Maruyama, T., Pristáš, G., Ueda, K., Kohara, T., Mitsuda, A., Sugishima, M., & Wada, H. (2014). NMR studies of ordered structures and valence states in the successive valence-transition system EuPtP. Physical Review B - Condensed Matter and Materials Physics, 90(19), Article 195106. https://doi.org/10.1103/PhysRevB.90.195106

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abstract = "We have studied EuPtP, which undergoes two successive valence transitions at TA∼240 K and TB∼200 K by P31-nuclear magnetic resonance (NMR) measurements. From the analysis of NMR spectra, we obtained plausible ordered structures and Eu valence states in three phases divided by TA and TB. These ordered structures well explain observed inequivalent P sites and the intensity ratio of the NMR spectra arising from these P sites. The results are also in good accordance with mean Eu valence measured by the x-ray absorption spectroscopy. We also discuss Eu 4f states and the origin of the transitions from the measurements of nuclear spin lattice relaxation rate and hyperfine coupling constant.",

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doi = "10.1103/PhysRevB.90.195106",

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AU - Mito, T.

AU - Nishitani, K.

AU - Koyama, T.

AU - Muta, H.

AU - Maruyama, T.

AU - Pristáš, G.

AU - Ueda, K.

AU - Kohara, T.

AU - Mitsuda, A.

AU - Sugishima, M.

AU - Wada, H.

PY - 2014/11/4

Y1 - 2014/11/4

N2 - We have studied EuPtP, which undergoes two successive valence transitions at TA∼240 K and TB∼200 K by P31-nuclear magnetic resonance (NMR) measurements. From the analysis of NMR spectra, we obtained plausible ordered structures and Eu valence states in three phases divided by TA and TB. These ordered structures well explain observed inequivalent P sites and the intensity ratio of the NMR spectra arising from these P sites. The results are also in good accordance with mean Eu valence measured by the x-ray absorption spectroscopy. We also discuss Eu 4f states and the origin of the transitions from the measurements of nuclear spin lattice relaxation rate and hyperfine coupling constant.

AB - We have studied EuPtP, which undergoes two successive valence transitions at TA∼240 K and TB∼200 K by P31-nuclear magnetic resonance (NMR) measurements. From the analysis of NMR spectra, we obtained plausible ordered structures and Eu valence states in three phases divided by TA and TB. These ordered structures well explain observed inequivalent P sites and the intensity ratio of the NMR spectra arising from these P sites. The results are also in good accordance with mean Eu valence measured by the x-ray absorption spectroscopy. We also discuss Eu 4f states and the origin of the transitions from the measurements of nuclear spin lattice relaxation rate and hyperfine coupling constant.

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NMR studies of ordered structures and valence states in the successive valence-transition system EuPtP

Abstract

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