Understanding the role of structural disorder on spin polarization in CeMnNi4 using XAFS

Journal Article · Wed Feb 03 00:00:00 EST 2010 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.82.134424· OSTI ID:1001316

Lahiri, D; Khalid, S; Modak, P; Raychaudhuri, P; Dhar, S K; Sharma, S M

The role of disorder on ferromagnetism has generally been detrimental. We show how Mn-Ni antisite disorder enhances polarization in CeMnNi{sub 4}. The disorder is determined to be 6% by x-ray absorption fine structure. The electronic structure of pure CeMnNi{sub 4} is pseudo-half-metallic. Site exchange alters the near neighbor bond parameters and modifies the density of states favorably, increasing the polarization (obtained by first-principles calculations) from 13 to 47% (experimental {approx}66%).

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
• Sponsoring Organization: DOE - Office Of Science
• DOE Contract Number: DE-AC02-98CH10886
• OSTI ID: 1001316
• Report Number(s): BNL-94313-2010-JA; ISSN 1550-235X; R&D Project: LS001; KC0401030; TRN: US201102%%88
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 82, Issue 13; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
ELECTRONIC STRUCTURE
FERROMAGNETISM
FINE STRUCTURE
POLARIZATION
SPIN
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