NMR and Magnetic Studies of Mechanically Alloyed Co_<75>Ti_<25>
スポンサーリンク
概要
- 論文の詳細を見る
We have measured zero field ^<59>Co NMR, X-ray diffraction (XRD) and magnetization in ferromagnetic mechanically alloyed Co_<79>Ti_<25> powder as a function of milling time at 4.2 K. The XRD patterns showed that the sample is primarily in an amorphous phase after a short milling time of 10 h, and no clear amorphous-crystalline phase transformation is detected with further milling. The NMR results revealed that successive phase transformations occur with milling, and the amorphous phase consists of small clusters of such ferromagnetic phases as fcc-Co_3Ti, hexagonal-Co_2Ti, bcc-Co_3Ti, fcc-Co and fcc-Co-Ti solid solution depending on the milling time. The bcc-Co_3Ti phase, being metastable, is a disordered one in contrast to the ordered fcc-Co_3Ti phase and has a Co magnetic moment larger than that of fcc-Co_3Ti. We suggest that the precipitation of Co plays an important role in the cyclic phase transformation, which was previously reported.
- 社団法人日本物理学会の論文
- 2003-06-15
著者
-
TOMIYOSHI Shoichi
Faculty of Engineering, Ehime University
-
Tomiyoshi Shoichi
Faculty Of Engineering Ehime University
-
Hiraoka K
Osaka Prefecture Coll. Nursing Osaka Jpn
-
Hiraoka Koichi
Faculty Of Engineering Ehime University
-
KASHIBA Saburo
Faculty of Engineering, Ehime University
-
Kashiba Saburo
Faculty Of Engineering Ehime University
関連論文
- ^ NQR Study of Uranium Ternary Compound UCu_2Sn
- NMR Spectra of ^59Co and ^14N in CoN (Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)
- NMR Spectra of ^Co and ^N in CoN
- Nuclear Relaxation of Hydrogen-Doped Antiferromagnetic YBa_2Cu_3O_6+xH_y
- NMR and Magnetic Studies of Mechanically Alloyed Co_M_ (M=Cu, Ag, Au)(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
- Proton NMR Studies on Hydrogen-Doped Superconductor YBa_2Cu_3O_H_x : II-C Neutron Scattering, NMR and NQR and Ultrasonics : II Oxide Superconductors; Experiments II : Electronic States
- Anomalous Paramagnetic Property of NdNbO_4 Single Crystals
- Neutron Paramagnetic Scattering from Antiferromagnetic RbMnF_3 and Mn_3Pt Using Time of Flight Technique
- Resolution Function and Recent Developments of the Multi-Analyser Crystal Spectrometer MAX
- Preparation of Oriented Orthorhombic LnBa_2Cu_3O_ Polycrystals
- Spin Dynamics in a Quasi-Two Dimensional Antiferromagnet MnTiO_3
- NMR and Magnetic Studies of Mechanically Alloyed Co_Ti_
- Helical Spin Structure of Mn_3Si
- Geometrical Effect in Magneto-Peltier Cooling of Bi and Bi_Sb_ Polycrystals
- Thermopower in Ce Kondo Systems
- Effect of Crystal Field on Kondo Resistivity in Ce Compounds
- Crystal Field in Kondo System
- NMR Study of Transferred Hyperfine and Exchange Interactions in Ferromagnetic Semiconductor EuLiH_3
- Effect of Annealing on Thermoelectric Properties of Bismuth Telluride Compounds