Inelastic Neutron Scattering Study of Mn

Conference · Mon Nov 09 04:00:00 EST 1998

OSTI ID:759309

Zhong, Y ^[1]; Sarachik, M P; Friedman, J R; Robinson, R A; Kelley, T M; Nakotte, H; Christianson, A C; Trouw, F; Aubin, S M.J.; Hendrickson, D N

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1. Los Alamos National Laboratory

The authors report zero-field inelastic neutron scattering experiments on a 14-gram deuterated sample of Mn{sub 12}-Acetate consisting of a large number of identical spin-10 magnetic clusters. Their resolution enables them to see a series of peaks corresponding to transitions between the anisotropy levels within the spin-10 manifold. A fit to the spin Hamiltonian H = {minus}DS{sub z}{sup 2} + {mu}{sub B}B{center_dot}g{center_dot}S-BS{sub z}{sup 4} + C(S{sub +}{sup 4} + S{sub {minus}}{sup 4}) yields an anisotropy constant D = (0.54 {+-} 0.02) K and a fourth-order diagonal anisotropy coefficient B = (1.2 {+-} 0.1) x 10{sup {minus}3}K. Unlike EPR measurements, their experiments do not require a magnetic field and yield parameters that do not require knowledge of the g-value.

• Research Organization: Los Alamos National Lab., NM (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 759309
• Report Number(s): LA-UR-98-4408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACETATES
INELASTIC SCATTERING
MAGNESIUM COMPOUNDS
MAGNETIC MATERIALS
NEUTRONS