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3 edition of Temperature-dependent knight shift in cadmium found in the catalog.

Temperature-dependent knight shift in cadmium

Robert Kasowski

Temperature-dependent knight shift in cadmium

a theoretical study.

by Robert Kasowski

  • 228 Want to read
  • 17 Currently reading

Published .
Written in English


Classifications
LC ClassificationsMicrofilm 29402
The Physical Object
FormatMicroform
Paginationp. 891-901.
Number of Pages901
ID Numbers
Open LibraryOL1250004M
LC Control Number94895589

In their work, the calculated lattice parameter agrees well with the experimental result, while the calculated electronic density of states possessing a sharply peaked feature in the vicinity of the Fermi energy level can be qualitatively linked to the temperature-dependent Knight shift observed for the NMR-active nuclei in Na 16 Rb 8 Si   The β'-phase Knight shift is temperature-independent and amounts to K β' = × 10 −3, whereas the γ-phase Knight shift is smaller and strongly temperature-dependent. Its temperature dependence could be well reproduced by the temperature dependence of .

  Knight Shift and Nuclear Spin-Lattice Relaxation Rate in Solid and Liquid Copper William W. Warren and W. Gilbert Clark Physical Review B 1 24 Crossref ADS APS Article. Temperature-dependence of knight shift in alkali metals S. K. Srivastava and P. K. Sharma Il Nuovo Cimento B Series 10 70 90 Crossref ADS.   In the context of the heavy fermions containing 4f or 5f electrons, both the Knight shift and the susceptibility are strongly temperature dependent. In these systems, the Knight shift is linearly proportional to the bulk susceptibility at high temperatures, but often exhibits an anomaly at low temperatures, in which case the linear behavior.

Both the Knight shift and Korringa product decrease sharply for n. Wright State University CORE Scholar Physics Faculty Publications Physics Nuclear-Magnetic-Resonance Studies of the Semiconductor-to-Metal Transition in Chlorine-Doped Cad.


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Temperature-dependent knight shift in cadmium by Robert Kasowski Download PDF EPUB FB2

Journals & Books; Help Kasowski [2] has also succeeded in the study of the temperature-dependent Knight shift in cadmium. How- ever, [in and Rothberg [31 have shown that the crystal pseudopotential with the Debye-Waller factor predicts a wrong sign of change in the isomer shift of (3-Sn with temperature.

Author: Liang-Shiun Chou, Shui Tien Lin. Measurements have been performed of the Knight shift in cadmium as a function of field between 1 and 20 kG at °K and as a function of temperature between and °K at kG. The field-dependent studies show an oscillatory behavior of the Knight shift at the de Haas-van Alphen frequency appropriate to the first band in the higher-field by: 7.

Temperature-Dependent Knight Shift in Cadmium: A Theoretical Study Kasowski, R. Abstract. Experimentally the Knight shift in Cd is characterized by (1) an increase in the nuclear resonance frequency of more than 70% in the temperature range from 0 to °K (melting point), (2) an increase of 33% in the isotropic Knight shift at the melting Cited by:   The Knight shift and its temperature dependence for a Cd impurity in palladium metal were measured by means of DPAD- and DPAC-methods utilizing the well known 5/2+, keV state inCd.

The shift at 80 K was found to be KS (CdPd, 80 K)=−(2)%. The observed variation of the KS in the temperature range from 80 K up to K is %. For calibration purposes an accurate Cited by:   The temperature-dependent Knight shift in cadmium has been investigated using our recent results for the temperature-dependent spin susceptibility.

Our calculation of the spin susceptibility includes the effect of lattice potential which includes the effect of electron-electron interaction via an effective one-particle approximation and spin-orbit by: 1.

Canada Received 30 October Contrary to the observations of previous workers the anisotropy of the Knight shift in cadmium is found to change from a positive value at 77oK to a negative value at oK. Several studies of the nuclear magnetic resonance in cadmium metal have been performed but only the most recent have extended below 77oK.

Phys. Chem. Solids Pergamon Press Vol. 27, pp. Printed in Great Britain. TEMPERATURE DEPENDENCE OF THE ISOTROPIC AND ANISOTROPIC KNIGHT SHIFT IN POLYCRYSTALLINE CADMIUM AND (B-TIN* F. BORSAf and R. BARNES Institute for Atomic Research and Department of Physics, Iowa State University, Ames, Iowa (Received 18 June ; in.

However the hexagonal close-packed (h.c.p.) metal cadmium, with probe nucleus Cd or Cd (both I=1/2), provides a striking exception to this rule, exhibiting a strong and nonlinear temperature dependence for the isotropic component K iso of the Knight shift, (and also the axial component K ax).See Fig.

1for data the temperature interval K to the melting point at. The nuclear magnetic resonance has been studied in single crystal magnesium at °K. The measured values for the Knight shift and quadrupolar interaction are K = ( ± )%, K′ = ( ± )%, e 2 qQ/h = ± 6 kc/s.

Comparison with the results of Rowland reveals the Knight shift to be independent of temperature in direct contrast to the behavior of cadmium, but the. adshelp[at] The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A.

RESULTS: CADMIUM has two magnetic isotopes, 11'Cd and 11'Cd, both spin 2 and both just over 12 Y. abundant. Since the crystal structure is hexagonal, the Knight shift of cadmium is not isotropic.

In fact, the principal source of broadening of the metal powder spectrum at fields of 1 T and above is the anisotropic Knight shift.

Temperature-Dependent Knight Shift in Cadmium: A Theoretical Study. Article. Nov ; Phys Rev; Robert Kasowski; Experimentally the Knight shift in Cd is characterized by (1) an increase in the. The nuclear magnetic resonance has been studied in single crystal magnesium at °K.

The measured values for the Knight shift and quadrupolar interaction are K = ( ± )%, K′ = (0. [25]Cadmium is also an unusual system because the Knight shift in cadmium is anisotropicChapter 3.

The Knight Shift 15and temperature of the purposes of this thesis is to determine if the conduction electrons in Sbare responsible for the giant K. The change of the Knight shift due to a uniaxial compression along the c axis was also derived: [Show full abstract] (∂lnK∂lnc)aT=+/ It is concluded that the large temperature.

The 67Zn nuclear quadrupole coupling (Cq = e2qQ/h) and isotropic and axial components of the Knight shift ( and Kax) have been determined, as well as the temperature variation of Cq and   A new 27 Al NMR has been observed in the paramagnetic state of GdAl 2 between ° and °K.

The 27 Al NMR linewidth δH was found to be strongly temperature‐dependent. Data are presented which suggest that the previously reported 27 Al NMR in GdAl 2 is probably due to a small amount of some other Gd–Al compound.

The 27 Al Knight shift is temperature‐dependent, varying. Ruvalds's 98 research works with 2, citations and reads, including: Superconductivity in Ba sub 4 BiPb sub 2 TlO sub 12 minus. delta. THE KNIGHT SHIFT OF CADMIUM IN SOME ALLOYS WITH GROUP IB AND IIB METALS.

Canadian Journal of Physics39 (6), DOI: /p H.W Rayson, W.A Alexander. Thermodynamics of the solid solutions of mercury in silver and gold. The Knight Shift in Silver-Cadmium Alloys The Ferromagnetic Shift in Iron Pure Quadrupole Resonance in Gallium Pressure and Temperature Dependence of Knight Shift Intensity of Cold Worked Copper Intensity of the Resonance in Dilute Copper Alloys The Second Moment Anisotropic Knight Shift in Tin, Thallium, Cadium and Mercury Exchange Broadening.

It is well-known that the exchange-polarized core s -electrons by partially filled magnetic d -band electrons are able to make characteristic contributions to effective magnetic field felt by nucleus within crystal, which leads to temperature-dependent and negative Knight shift (indirect Knight shift) and nuclear magnetic resonance absorption in ferromagnetic metals.

If the susceptibility is strongly temperature dependent, then the Knight shift should be as well. By measuring K(T) and χ(T) independently, and plotting K versus χ with T as an implicit parameter, one can extract the value of the hyperfine coupling constant, A.

In the CeMIn 5 materials, χ is strongly temperature dependent with Curie–Weiss.The Knight shift of a short lived β-emitting nucleus 12B (I = 1, T 1/2 = 20 ms) implanted into Pt has been measured as a function of temperature (− K) by means of the β-NMR method.

The relation between the Knight shift and the susceptibility for Pt was deduced, which shows the similar tendency to that for the case of 12B in Pd.