TY - JOUR
T1 - Giant magnetocaloric effect and soft-mode magneto-structural phase transition in MnAs
AU - Zou, J. D.
AU - Wada, H.
AU - Shen, B. G.
AU - Sun, J. R.
AU - Li, W.
PY - 2008/2/1
Y1 - 2008/2/1
N2 - Maxwell relation and mean-field approximation are chosen to estimate the total entropy change and the magnetic entropy change, respectively. The experimental results are exactly consonant with the theoretical results. Consequently, the magnetic entropy changes make up the majority of the total entropy change, and the lattice entropy changes are small. The giant magnetocaloric effect in MnAs is clarified. According to thermodynamics discussion, the modulus of compression and the stress at TC decrease dramatically. Therefore, the magneto-structural phase transition in MnAs is a kind of soft mode.
AB - Maxwell relation and mean-field approximation are chosen to estimate the total entropy change and the magnetic entropy change, respectively. The experimental results are exactly consonant with the theoretical results. Consequently, the magnetic entropy changes make up the majority of the total entropy change, and the lattice entropy changes are small. The giant magnetocaloric effect in MnAs is clarified. According to thermodynamics discussion, the modulus of compression and the stress at TC decrease dramatically. Therefore, the magneto-structural phase transition in MnAs is a kind of soft mode.
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U2 - 10.1209/0295-5075/81/47002
DO - 10.1209/0295-5075/81/47002
M3 - Article
AN - SCOPUS:79051469173
SN - 0295-5075
VL - 81
JO - Journal de Physique (Paris), Lettres
JF - Journal de Physique (Paris), Lettres
IS - 4
M1 - 47002
ER -