  Searching for exotic interactions provides a path for exploring new particles
beyond the standard model. Here, we used an ensemble-NV-diamond magnetometer to
search for an exotic spin- and velocity-dependent interaction between polarized
electron spins and unpolarized nucleons at the micrometer scale. A thin layer
of nitrogen-vacancy electronic spin ensemble in diamond is utilized as both the
solid-state spin quantum sensor and the polarized electron source, and a
vibrating lead sphere serves as the moving unpolarized nucleon source. The
exotic interaction is searched by detecting the possible effective magnetic
field induced by the moving unpolarized nucleon source using the
ensemble-NV-diamond magnetometer. Our result establishes new bounds for the
coupling parameter $f_\perp$ within the force range from 5 to 400 $\rm \mu$m.
The upper limit of the coupling parameter at 100 $\rm \mu$m is $\lvert f_\perp
\rvert \leq 1.1\times 10^{-11}$, which is 3 orders of magnitude more stringent
than the previous constraint. This result shows that NV ensemble can be a
promising platform to search for hypothetical particles beyond the standard
model.
