This title appears in the Scientific Report :
2005
Please use the identifier:
http://dx.doi.org/10.1016/j.physb.2004.10.027 in citations.
Weak ferromagnets with integer and half-integer spin quantum numbers
Weak ferromagnets with integer and half-integer spin quantum numbers
Experimental investigations are presented which demonstrate that the weak ferromagnets are special materials of a larger group of magnets which exhibit two magnetic ordering structures. In weak ferromagnets the main order is anti ferromagnetic with a small ferromagnetic component existing in additio...
Saved in:
Personal Name(s): | Köbler, U. |
---|---|
Hoser, A. / Bos, J. / Schäfer, W. / Pohlmann, L. | |
Contributing Institute: |
Streumethoden; IFF-ISM Elektronische Eigenschaften; IFF-IEE |
Published in: | Physica / B, 355 (2005) S. 90 - 99 |
Imprint: |
Amsterdam
North-Holland Physics Publ.
2005
|
Physical Description: |
90 - 99 |
DOI: |
10.1016/j.physb.2004.10.027 |
Document Type: |
Journal Article |
Research Program: |
Kondensierte Materie |
Series Title: |
Physica B: Condensed Matter
355 |
Subject (ZB): | |
Publikationsportal JuSER |
Experimental investigations are presented which demonstrate that the weak ferromagnets are special materials of a larger group of magnets which exhibit two magnetic ordering structures. In weak ferromagnets the main order is anti ferromagnetic with a small ferromagnetic component existing in addition. On the other hand, materials in which other combinations of the two basic ordering structures coexist are also known. Common to all these non-collinear spin structures is that the moment components of the two magnetic structures are orthogonal. In the weak ferromagnets this orthogonality manifests already in the paramagnetic phase as a crossover from an isotropic to an anisotropic susceptibility with respect to the applied magnetic field: at high temperatures the antiferromagnetic Curie-Weiss law of the total moment is observed while for T --> T-c crossover to a second Curie-Weiss law due to the weak ferromagnetic component occurs. For T --> T-c the ferromagnetic component is, of course, parallel to the field and the anti ferromagnetic component is perpendicular to the field, Arguments will be given that in isotropic magnets with a half-integer spin the two magnetic ordering structures can be identified as different order parameters. (C) 2004 Elsevier B.V. All rights reserved. |