The temperature dependence of bubble-domain properties in YGdEu-, YGdEr-, YGdTm-, and YGdYb-garnets

Data are presented on the temperature dependence (from ∼ 0°C to 120°C) of the magnetization, characteristic length, and uniaxial anisotropy constant in LPE films of Y
1.5
Gd
0.8
Eu
0.7
Fe
4.3
Al
0.6
Ga
0.1
O
12
, Y
1.0
Gd
1.0
Er
1.0
Fe
4.5
Al
0.3
Ga
0.2
O
12
, Y
0.9
Gd
1.5
Yb
0.6
Fe
4.5
Al
0.5
O
12
, Y
1.0
Gd
1.0
Tm
1.0
Fe
4.4
Ga
0.6
O
12
, Y
1.1
Gd
0.8
Tm
1.1
Fe
4.4
Ga
0.6
O
12
, and Y
1.2
Gd
0.6
Tm
1.2
Fe
4.4
Ga
0.6
O
12
, Included are samples having a range of strain- and growth-induced anisotropies. We find that the magnetization can readily be made temperature independent from ∼20 to ∼100°C in these materials but that K
u
, and hence
l
, has a negative temperature coefficient. The variation of K
u
with temperature has an approximately exponential variation in all samples.