ʑ

ʑ U+0291, ʑ LATIN SMALL LETTER Z WITH CURL ← ʐ [U+0290] IPA Extensions ʒ → [U+0292]

Character variations

ᶽ U+1DBD, ᶽ MODIFIER LETTER SMALL Z WITH CURL ← ᶼ [U+1DBC] Phonetic Extensions Supplement ᶾ → [U+1DBE]

English Wikipedia has an article on:

Voiced alveolo-palatal fricative

Wikipedia

Based on the letter z

• IPA:

  (file)

ʑ

1. (IPA) a voiced alveolo-palatal sibilant.
2. (superscript ⟨ᶽ⟩, IPA) [ʑ]-fricated release of a plosive (e.g. [dᶽ], sometimes implying an affricate [d͜ʑ]); [ʑ]-coloring; or a weak, fleeting or epenthetic [ʑ].

• (Latin script):  Aa  Bb  Cc  Dd  Ee  Ff  Gg  Hh  Ii  Jj  Kk  Ll  Mm  Nn  Oo  Pp  Qq  Rr  Sſs  Tt  Uu  Vv  Ww  Xx  Yy  Zz
• (Variations of letter Z):  Źź  Ẑẑ  Žž  Żż  Ẓẓ  Ẕẕ  Ƶƶ  Ȥȥ  Ⱬⱬ  ᵶ  ᶎ  ʐ  ʑ  ɀ  ᴢ  Ｚｚ  DZDzdz  DZDzdz  DŽDždž  DŽDždž
• (Letters with curl):  ɕ  ȡ  ȶ  ʑ

• ʝ (similar)