Tunable Thermal Hysteresis in Magnetic Multilayers: Magnetic Superheating and Supercooling

reportActive / Technical Report | Accession Number: ADA469786 | Open PDF

Abstract:

The phenomena of superheating and supercooling can lead to a thermal hysteresis curve where two states are stable over a range of temperatures. Here we present a simple magnetic multilayer system FeGd that can be designed to show a thermal hysteresis curve. Calculations show that, with proper choice of parameters, the width, in temperature, of the hysteresis curve can be controlled by an external magnetic field and varies from 20 to 100K over a field range of 300 600 Oe. Polarized neutron reflectivity measurements confirm that such behavior is realized experimentally in multilayers of FeGd.

Author(s):
Camley, R. E. ; Lohstroh, W. ; Felcher, G. P. ; Hosoito, N. ; Hashizume, H.
Author Organization(s):
COLORADO UNIV AT COLORADO SPRINGS DEPT OF PHYSICS
Descriptive Note:
Journal article
Supplementary Note:
Sponsored in part by U.S. Dept. of Energy Grant no. W31-109-ENG-38. Prepared in collaboration with Vrije Universiteit, Amsterdam, The Netherlands; the Material Science Division, Argonne National Laboratory, Argonne, IL; and Research and Education Center for Materials Science, Nara Institute of Science and Technology, Ikoma, Japan. Published in the Journal of Magnetism and Magnetic Materials, v286, p65-71, 2005.
Pagination:
0008

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
ARO-42253.13-PH
Contract/Grant Number(s):
DAAD19-02-1-0174
Monitor Series:
42253.13-PH, ARO
 Subject Terms
Joint Capability Areas:
JCA_1_Force Support; JCA_3.2_Engagement; JCA_3_Force Application; JCA_1.2_Force Preparation; JCA_1.2.3_Educating; JCA_6_Net Centric; JCA_8_Building Partnerships
Modernization Areas:
Microelectronics
Communities of Interest:
Advanced Electronics
Descriptor(s):
*INTERFACES, *IRON, *HYSTERESIS, *GADOLINIUM, REPRINTS, NEUTRONS, ALGEBRAIC FUNCTIONS, FERROMAGNETIC MATERIALS, SUPERHEATING, SUPERCOOLING, MAGNETIC FIELDS
Field(s)/Group(s):
Properties of Metals and Alloys, Numerical Mathematics, Operations Research, Electricity and Magnetism
Keyword(s):
*THERMAL HYSTERESIS, MAGNETIC PHASE TRANSITIONS, MAGNETIC MULTILAYERS
Report Date:
2004 Oct 22
Creation Date:
2007 Jul 25