Low-temperature crystal structure and magnetic properties of Gd5Ge3
| Title | Low-temperature crystal structure and magnetic properties of Gd5Ge3 |
| Publication Type | Journal Article |
| Year of Publication | 2012 |
| Authors | Mudryk Y, Paudyal D, Pecharsky VK, Gschneidner KA |
| Journal Title | Physical Review B |
| Volume | 85 |
| Pages | 014116 |
| Date Published | 01 |
| Type of Article | Article |
| ISBN Number | 1098-0121 |
| Accession Number | WOS:000299867400003 |
| Keywords | alloys, d88 structure, gd-5(si1.8ge2.2), gd-5(sixge1-x)(4), giant magnetoresistance, intermetallic compounds, interstitial compounds, MAGNETOCALORIC COMPOUND, rare-earth germanides, system |
| Abstract | The Gd5Ge3 compound prepared using high-purity gadolinium undergoes a structural deformation from hexagonal Mn5Si3-type structure into a new orthorhombic crystal structure. The temperature of the structural transition coincides with the Neel temperature (T-N), confirming the coupling between magnetism and crystal structure. The same intermetallic compound prepared using a commercial grade of gadolinium shows only a minor orthorhombic structural deformation at T-N, which is 19 K lower than that of a Gd5Ge3 sample prepared from the high-purity Gd. The first-principles electronic structure calculations confirm the antiferromagnetic orthorhombic structure as the ground state of Gd5Ge3 and show that interstitial impurities affect the strength of the antiferromagnetic interactions. |
| URL | <Go to ISI>://WOS:000299867400003 |
| DOI | 10.1103/PhysRevB.85.014116 |
| Alternate Journal | Phys. Rev. B |
