Measurements of the spectral distribution of the light absorption coefficient in the garnet NaCa2Mn2V3O12 are performed in a wide range of wavelengths. The influence of unpolarized illumination of a crystal on the light absorption spectrum is investigated. A substantial long-lived photoinduced effect is observed at low temperatures. This effect is manifested as a change in the spectral distribution of the light absorption coefficient and reflects a lowering of the valence of the vanadium ions under the influence of photoillumination.

1.
V. I.
Kudinov
,
I. L.
Chaplygin
,
A. I.
Kirilyuk
,
N. M.
Kreines
,
R.
Laiho
,
E.
Lahderanta
, and
C.
Ayache
,
Phys. Rev. B
47
,
9017
(
1993
).
2.
I.
Fugol
,
V.
Samovarov
,
A.
Ratner
,
V.
Zhuravlev
,
G.
Saemann-Ischenko
,
M.
Lippert
, and
B.
Holzapfel
,
Physica C
216
,
391
(
1993
).
3.
V. V.
Eremenko
,
I. S.
Kachur
,
V. G.
Piryatinskaya
,
A. M.
Ratner
, and
V. V.
Shapiro
,
Physica C
262
,
54
(
1996
).
4.
V. M.
Dmitriev
,
V. V.
Eremenko
,
I. S.
Kachur
,
V. G.
Piryatinskaya
,
O. R.
Prikhod’ko
,
A. M.
Ratner
,
E. V.
Khristenko
, and
V. V.
Shapiro
, Fiz. Nizk. Temp. 21, 219 (1995) [
Low Temp. Phys.
25
,
168
(
1995
)].
5.
R. W.
Teale
and
D. W.
Temple
,
Phys. Rev. Lett.
19
,
904
(
1967
).
6.
R. F.
Pearson
,
A. D.
Annis
, and
P.
Kompfner
,
Phys. Rev. Lett.
21
,
1805
(
1968
).
7.
K.
Hisatake
,
J.
Matsubara
,
K.
Maeda
,
H.
Yasuoka
,
H.
Mazaki
, and
K.
Vematsu
,
J. Magn. Magn. Mater.
140–144
,
2127
(
1995
).
8.
J. F.
Dillon
,
E. M.
Gyorgy
, and
J. P.
Remeika
,
Phys. Rev. Lett.
23
,
643
(
1969
).
9.
H.
Van der Heide
,
Solid State Commun.
6
,
347
(
1968
).
10.
E. M.
Gyorgy
,
J. F.
Dillon
, and
J. P.
Remeika
,
J. Appl. Phys.
42
,
1454
(
1971
).
11.
V. V.
Eremenko
,
S. L.
Gnatchenko
,
I. S.
Kachur
,
V. G.
Piryatinskaya
,
A. M.
Ratner
, and
V. V.
Shapiro
,
Phys. Rev. B
61
,
10670
(
2000
).
12.
V. V.
Eremenko
,
S. L.
Gnatchenko
,
I. S.
Kachur
,
V. G.
Piryatinskaya
,
A. M.
Ratner
,
V. V.
Shapiro
,
M.
Fally
, and
R. A.
Rupp
, Fiz. Nizk. Temp. 27, 30 (2001) [
Low Temp. Phys.
27
,
22
(
2001
)].
13.
V. V.
Eremenko
,
S. L.
Gnatchenko
,
I. S. Kachur. V. G.
Piryatinskaya
,
A. M.
Ratner
,
M. B.
Kosmyna
,
B. P.
Nazarenko
, and
V. M.
Puzikov
,
J. Phys.: Condens. Matter
15
,
4025
(
2003
).
14.
G.
Oversluizen
and
R.
Metselaar
,
J. Phys. C
15
,
4869
(
1982
).
15.
V.
Havlicek
,
P.
Novak
, and
M.
Vichr
,
Phys. Status Solidi B
44
,
K21
(
1971
).
16.
K. P.
Belov
and
V. I.
Sokolov
, Usp. Fiz. Nauk 121, 285 (1977) [
Sov. Phys. Usp.
20
,
149
(
1977
)].
17.
V. V.
Eremenko
,
S. L.
Gnatchenko
,
I. S.
Kachur
,
V. G.
Piryatinskaya
,
A. M.
Ratner
,
V. V.
Shapiro
,
M. B.
Kosmyna
,
B. P.
Nazarenko
, and
V. M.
Puzikov
,
Ukr. Phys. J.
49
,
432
(
2004
).
18.
D. R.
Huffman
,
R. L.
Wild
, and
M.
Shinmei
,
J. Chem. Phys.
50
,
4092
(
1969
).
19.
S.
Kuck
,
S.
Hartung
,
S.
Hurling
,
K.
Petermann
, and
G.
Huber
,
Phys. Rev. B
57
,
2203
(
1998
).
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