skip to main content

SciTech ConnectSciTech Connect

Title: Synthesis and magnetism of single-phase Mn-Ga films

Single-phase noncubic Mn-Ga films with a thickness of about 200 nm were fabricated by an in situ annealing of [Mn(x)/Ga(y)/Mn(x)]{sub 5} multilayers deposited by e-beam evaporation. Mn-Ga alloys prepared in three different compositions Mn{sub 2}Ga{sub 5} and Mn{sub 2}Ga were found to crystallize in the tetragonal tP14 and tP2 structures, respectively. Mn{sub 3}Ga crystallizes in the hexagonal hp8 or tetragonal tI8 structures. All three alloys show substantial magnetocrystalline anisotropy between 7 and 10 Mergs/cm{sup 3}. The samples show hard magnetic properties including coercivities of Mn{sub 2}Ga{sub 5} and Mn{sub 2}Ga about 12.0 kOe and of Mn{sub 3}Ga about 13.4 kOe. The saturation magnetization and Curie temperature of Mn{sub 2}Ga{sub 5}, Mn{sub 2}Ga, and Mn{sub 3}Ga are 183 emu/cm{sup 3} and 435 K, 342 emu/cm{sup 3} and 697 K, and 151 emu/cm{sup 3} and 798 K, respectively. The samples show metallic electron transport up to room temperature.
Authors:
; ;  [1] ;  [2] ;  [1] ;  [2] ;  [1]
  1. Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
22410145
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANNEALING; COERCIVE FORCE; CURIE POINT; ELECTRON BEAMS; ENERGY BEAM DEPOSITION; EVAPORATION; FILMS; GALLIUM; HEXAGONAL LATTICES; INTERMETALLIC COMPOUNDS; LAYERS; MAGNETIC PROPERTIES; MAGNETISM; MAGNETIZATION; MANGANESE; SYNTHESIS; TEMPERATURE RANGE 0273-0400 K; TETRAGONAL LATTICES