Morphotropic Phase Boundaries in Ferromagnets: Tb_1-xDy_xFe₂ Alloys

TY - JOUR

T1 - Morphotropic Phase Boundaries in Ferromagnets

T2 - Tb1-xDyxFe2 Alloys

AU - Bergstrom, R. Jr.

AU - Wuttig, M.

AU - Cullen, J.

AU - Zavalij, P.

AU - Briber, R.

AU - Dennis, C.

AU - Garlea, V. O.

AU - Laver, Mark

PY - 2013/7/3

Y1 - 2013/7/3

N2 - The structure and properties of the ferromagnet Tb1-xDy xFe2 are explored through the morphotropic phase boundary (MPB) separating ferroic phases of differing symmetry. Our synchrotron data support a first order structural transition, with a broadening MPB width at higher temperatures. The optimal point for magnetomechanical applications is not centered on the MPB but lies on the rhombohedral side, where the high striction of the rhombohedral majority phase combines with the softened anisotropy of the MPB. We compare our findings with single ion crystal field theory and with ferroelectric MPBs, where the controlling energies are different.

AB - The structure and properties of the ferromagnet Tb1-xDy xFe2 are explored through the morphotropic phase boundary (MPB) separating ferroic phases of differing symmetry. Our synchrotron data support a first order structural transition, with a broadening MPB width at higher temperatures. The optimal point for magnetomechanical applications is not centered on the MPB but lies on the rhombohedral side, where the high striction of the rhombohedral majority phase combines with the softened anisotropy of the MPB. We compare our findings with single ion crystal field theory and with ferroelectric MPBs, where the controlling energies are different.

U2 - 10.1103/PhysRevLett.111.017203

DO - 10.1103/PhysRevLett.111.017203

M3 - Journal article

C2 - 23863024

SN - 0031-9007

VL - 111

JO - Physical Review Letters

JF - Physical Review Letters

IS - 1

M1 - 017203

ER -