MAGNETISM ELECTRON TRANSPORT MAGNETORESISTIVE LANTHANUM CALCIUM MANGANITE

Specific Heat of SrRuO 3
energy magnetic excitations than the saturation magnetization, particularly
for polycrystalline samples with large magnetocrystalline anisotropy such as
SrRuO 3 .
Like the magnetization measurements, the heat capacity measurements
can be well described by a decrease in the magnetization proportional to T n
where n ≈ 2. This can be understood by any of three mechanisms. First, if the
corrections are included in the spin wave theory then an effective n > 3/2 is
predicted. Second, single particle excitations are present. Third, the
excitations interact (requiring a more generalized description [85]) to give an
effective exponent n ≈ 2.
The same phenomena can also be interpreted as a spin fluctuation
enhancement of the electronic specific heat, which can be suppressed by a
magnetic field.
The help of K. A. Moler for the heat capacity measurements is greatly
appreciated.
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