It is tempting to select crucifixion themed hymns, or Hymns of Good Friday, of which there are many for today. But the feast is specifically about the cross and about its exaltation. Hymns for Prayer and Praise has a good text at #439 the first verse is:
At peace in Christ, by Love's design.
Aelred-Seton Shanley has two good hymns:
Behold the Cross, the tree of life
where set the Sun whom we betrayed;
here he in flesh who fleshed our race,
our sentence bore, our ransom paid.
O barren wood, now bloodied, nailed,
which reeks of rancid wine and scorn;
from you springs up the shoot of life:
a new humanity is born.
O cross burned in the human heart,
whose shadow circles all in night;
within your darkness dawns our hope:
the slaughtered lamb, the world's true light.
Immortal, holy, mighty God
whose love for us, by spear, floods forth;
O Trinity, out poured in Love,
embracing earth upon this cross;
all praise be yours as we proclaim
life's glorious rising and its source.
The second seems to capture a good strong Easter tone and sense of exaltation:
O Cross of Christ, which once dealt death:
bring light where there is dark despair.
To you be glory, Lord of Life,
hose heart was pierced upon this tree.
Our praise, our lasting love, our thanks
both now and in eternity.