Structural and photoluminescence studies on europium-doped lithium tetraborate (Eu:Li
2
B
4
O
7
) single crystal grown by microtube Czochralski (μT-Cz) technique
Kumaresh A
1, 2
, Arun Kumar R
1, 2, †,
, Ravikumar N
1, 2
, Madhusoodanan U
3
, Panigrahi B S
3
, Marimuthu K
4
, Anuradha M
5
Powder XRD spectra of Eu-doped (a) and pure (b) LTB polycrystalline materials.