• Title/Summary/Keyword: spin reorientation

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$^{13}$C NMR Study of Segmental Motions of n-Heptane in Neat Liquid

  • Min, Buem-Chan;Chang, Sei-Hun;Shin, Kook-Joe;Lee, Jo-Woong
    • Bulletin of the Korean Chemical Society
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    • v.6 no.6
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    • pp.354-358
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    • 1985

  • Carbon-13 nuclear spin-lattice relaxation times have been measured over the range of temperature from 213K to 353K for carbons in n-heptane in neat liquid. The experimental data have been analyzed to obtain informations of segmental motions in the chain polymers by employing a model which describes jumps between several discrete states with different lifetimes. The overall reorientation of the molecule is assumed to be isotropic rotational diffusion. From the above analysis the activation energies of each C-C bond reorientation as well as the overall reorientation have been obtained through the Arrhenius-type temperature dependence.

  • https://doi.org/10.5012/bkcs.1985.6.6.354 인용 PDF

Thickness-Driven Spin Reorientation Transition in Co/Pd(111); In Situ SMOKE Three-Dimensional Vector Magnetometry

  • Lee, Jeong-Won;Kim, Sang-Koog;Kim, Jonggeol;Jeong, Jong-Ryul;Ahn, Jae-Seok;Shin, Sung-Chul
    • Proceedings of the Korean Magnestics Society Conference
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    • 2000.09a
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    • pp.287-296
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    • 2000

  • We have developed a three-axis configurational in situ SMOKE apparatus by which three-dimensional vector magnetization reversal processes are studied for ultrathin Co films grown on a Pd (111) single crystal in the thickness range of spin-reorientation transition. This study provides a better understanding of magnetization reversal motions with the knowledge of 3 components of magnetization vector at the transition of an easy axis of magnetization from the film normal at 5 ML Co to in-plane at 6 ML Co (ML notes monolayer). For a 5.25 ML Co, it was observed that a slightly canted magnetization vector from the film normal rotated in the film plane under an applied field direction parallel to the film normal.

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Thickness-Driven Spin Reorientation Transition in Co/Pd(111) : In Situ SMOKE Three-Dimensional Vector Magnetometry

  • Lee, Jeong-Won;Kim, Sang-Koog;Kim, Jonggeol;Jeong, Jong-Ryul;Ahn, Jae-Seok;Shin, Sung-Chul
    • Journal of Magnetics
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    • v.6 no.2
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    • pp.53-56
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    • 2001

  • We have developed a three-axis configurational in situ SMOKE apparatus by which three-dimensional vector magnetization reversal processes are studied for ultrathin Co films grown on a Pd (111) single crystal in the thickness range of spin reorientation transition. This study provides a better understanding of magnetization reversal motions with the knowledge of three components of the magnetization vector at the transition of an easy axis of magnetization from the film normal at 5 ML Co to in-plane at 6 ML Co (ML denotes monolayer). For a 5.25 ML Co, it was observed that a slightly canted magnetization vector from the film normal rotated in the film plane under an applied field direction parallel to the film normal.

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