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This content will become publicly available on July 15, 2019

Title: Best practices in evaluation of the magnetocaloric effect from bulk magnetization measurements

Conventional magnetometry is irreplaceable in evaluating bulk magnetization of materials over broad temperature and field ranges. The technique is also effective in quantifying hysteresis that may be associated with magnetic and structural phase transitions that occur during the magnetizing/demagnetizing cycling, and the derived magnetic field-induced isothermal entropy change – one of the most important properties in the field of magnetocalorics. Both systematic and random errors present during the measurements of magnetization, however, may lead to erroneous conclusions. Using two well-known materials – elemental Gd and intermetallic Gd 5Si 2Ge 2 as examples, we consider best practices in performing reliable and rapid magnetization measurements for proper characterization of magnetocaloric properties.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [3]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States); Federal Univ. of Santa Catarina (UFSC), Florianopolis, SC (Brazil). Polo – Research Lab. for Emerging Technologies in Cooling and Thermophysics, Dept. of Mechanical Engineering
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  3. Iowa State Univ., Ames, IA (United States). Dept. of Materials Science and Engineering
Publication Date:
Report Number(s):
IS-J-9651
Journal ID: ISSN 0304-8853; PII: S0304885317336211
Grant/Contract Number:
AC02-07CH11358
Type:
Accepted Manuscript
Journal Name:
Journal of Magnetism and Magnetic Materials
Additional Journal Information:
Journal Volume: 458; Journal Issue: C; Journal ID: ISSN 0304-8853
Publisher:
Elsevier
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Magnetocaloric; Magnetization; Entropy change
OSTI Identifier:
1436429