Published April 2005
| Version v1
Journal article
Adiabatic demagnetization of a pyrochlore antiferromagnet Gd2Ti2O7
Creators
- 1. P. Kapitza Institute for Physical Problems RAS, Kosygin str. 2, 119334 Moscow (Russian Federation)
- 2. Department of Physics and Astronomy, University of Manchester, Manchester M13 9PL (United Kingdom)
- 3. Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom)
- 4. Comissariat a l'Energie Atomique, DSM/DRFMC/SPSMS, Grenoble Cedex 9 (France)
Description
An adiabatic demagnetization process is studied in the pyrochlore antiferromagnet Gd2Ti2O7. A strong cooling of the sample is observed by decreasing magnetic field in the range 120-60 kOe corresponding to a crossover between saturated and spin-liquid phases. This phenomenon indicates that a considerable part of the magnetic entropy associated with a macroscopic number of local soft modes survives in the strongly correlated paramagnetic state. Monte Carlo simulations demonstrate good agreement with the experiment. The cooling power of the process is experimentally estimated with a view to possible technical applications. The results on Gd2Ti2O7 are compared to those for Gd3Ga5O12, a related material for low-temperature magnetic cooling
Additional details
Identifiers
- DOI
- 10.1016/j.jmmm.2004.11.344;
- PII
- S0304-8853(04)01609-9;
Publishing Information
- Journal Title
- Journal of Magnetism and Magnetic Materials
- Journal Volume
- 290-291
- Journal Page Range
- p. 709-711
- ISSN
- 0304-8853
- CODEN
- JMMMDC
Conference
- Title
- Joint European magnetic symposia
- Acronym
- JEMS '04
- Dates
- 5-10 Sep 2004
- Place
- Dresden (Germany)
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37029184
- Subject category
- S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ADIABATIC DEMAGNETIZATION; ANTIFERROMAGNETIC MATERIALS; COMPUTERIZED SIMULATION; COOLING; ENTROPY; GADOLINIUM COMPOUNDS; LIQUIDS; MAGNETIC FIELDS; MONTE CARLO METHOD; PARAMAGNETISM; PYROCHLORE; SPIN; TITANATES
- Descriptors DEC
- ANGULAR MOMENTUM; CALCULATION METHODS; DEMAGNETIZATION; FLUIDS; MAGNETIC MATERIALS; MAGNETISM; MATERIALS; MINERALS; OXYGEN COMPOUNDS; PARTICLE PROPERTIES; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SIMULATION; THERMODYNAMIC PROPERTIES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Copyright
- Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.