Phonon anomalies in YNi{sub 2}{sup 11}B{sub 2}C

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1007/BF00753934· OSTI ID:443712

Kawano, H ^[1]; Yoshizawa, H ^[2]; Takeya, H ^[3]

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1. Institute of Physical and Chemical Research (RIKEN), Wako, Saitama (Japan)
2. Univ. of Tokyo, Tokai, Ibaraki (Japan)
3. National Research Insutitute for Metals, Tsukuba, Ibaraki (Japan); and others

Recently the authors have discovered a new peak with phonon character which appears only below T{sub c} in an intermetallic superconductor, YNi{sub 2} {sup 11}B{sub 2}C (T{sub c} {approximately} 14.2K) by neutron inelastic scattering measurements. The peak shows the order-parameter-like temperature dependence of the superconductivity. The new peak grows by absorbing the spectral weight from the above lying soft phonon mode. In the present study they investigate the magnetic field dependence of the new peak. With increasing magnetic field, the new peak is gradually suppressed and disappears by H=H{sub C2} ({approximately}4.7T at T=5.5K). Beyond H{sub C2}, the profile of the scattering function recovers that of the non-superconducting state above T{sub c}. These results strongly indicate that this new peak is undoubtedly associated with the superconducting state in YNi{sub 2}{sup 11}B{sub 2}C.

• Sponsoring Organization: USDOE
• OSTI ID: 443712
• Report Number(s): CONF-960808--
• Journal Information: Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 5-6 Vol. 105; ISSN JLTPAC; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BORON 11
BORON CARBIDES
ELECTRON-PHONON COUPLING
ENERGY SPECTRA
INELASTIC SCATTERING
INTERMETALLIC COMPOUNDS
NEUTRONS
NICKEL CARBIDES
PHONONS
YTTRIUM OXIDES