Biomedical Engineering Reference
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9.13 Morphology of polymer-ceramic nanocomposites with SHMPE
(a) and (b) and i-PP (c) and (d) as binders. Y 1 Ba 2 Cu 3 O 6.97 :binder (wt%)
= 85:15 (a) and (c), 80:20 (b) and (d) [25].
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9.6
Influences on the magnetic properties of SC
polymer-ceramic nanocomposites
It is known that high-temperature superconducting (sc) oxide ceramics
possess their own localized magnetic moments, producing a Cu 2+ EPR
signal. Nevertheless, it should be noted that there are two types of copper
atoms in Y 1 Ba 2 Cu 3 O 7 x ceramics: Cu 2+ (I) and Cu 2+ (II). The first is in the
CuO chain along the axis direction, while the second is in the CuO 2 planes
along the ab plane. For a long time, the nature of the Y 1 Ba 2 Cu 3 O 7 x
ceramics' EPR response was unclear [41].
Investigations [42, 43] have been conducted into the dependence of Cu 2+
EPR signal intensity with simultaneous registration of X-ray absorption
near edges structure (XANES) at the Cu 2+ k edges of the same signals [44],
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