Spontaneous generation of voltage in the magnetocaloric compound La(Fe0.88Si0.12)(13) and comparison to SmMn2Ge2
| Title | Spontaneous generation of voltage in the magnetocaloric compound La(Fe0.88Si0.12)(13) and comparison to SmMn2Ge2 |
| Publication Type | Journal Article |
| Year of Publication | 2009 |
| Authors | Zou M, Sampaio JA, Pecharsky VK, Gschneidner KA |
| Journal Title | Physical Review B |
| Volume | 80 |
| Pages | 172403 |
| Date Published | Nov |
| ISBN Number | 1098-0121 |
| Accession Number | ISI:000272310400010 |
| Keywords | gd5si2ge2, iron compounds, lanthanum compounds, magnetic transitions, magnetocaloric effects, manganese compounds, samarium compounds, TRANSFORMATION |
| Abstract | Relationships among spontaneous generation of voltage (SGV), magnetocaloric effect, temperature induced first-order magnetic phase transformation, and its thermal effect have been studied based on experimental results of La(Fe0.88Si0.12)(13) and SmMn2Ge2 compounds. Remarkable differences in magnetocaloric effects and temperature-induced unit-cell volume changes during their first-order magnetic phase transformations lead to dramatic differences in their SGV effects. Both temperature and magnetic field trigger SGV in La(Fe0.88Si0.12)(13) compound, but no SGV has been observed in SmMn2Ge2. Our results clarify that it is not the first-order crystallographic or magnetic phase transformation per se, but the strong thermal effects, i.e., latent heat and magnetocaloric effect that play the key role in the SGV mechanism. |
| URL | <Go to ISI>://000272310400010 |
| DOI | 10.1103/Physrevb.80.172403 |
