---
title: "Surface Ferro (or Antiferro) Magnetism in Bulk Antiferro (or Ferro) Magnets: Renormalization Group Analysis • CBPF Index"
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**Physics Note****Published**

# **Surface Ferro (or Antiferro) Magnetism in Bulk Antiferro (or Ferro) Magnets: Renormalization Group Analysis**

**E. F. Sarmento; C. Tsallis**

1985

[**Download PDF **0.3 MB](https://index.cbpf.br/files/publicacao/6ad2a767639f62b11adbb808/pdf) [**Contact owner**](<mailto:apub@cbpf.br?subject=Surface%20Ferro%20(or%20Antiferro)%20Magnetism%20in%20Bulk%20Antiferro%20(or%20Ferro)%20Magnets%3A%20Renormalization%20Group%20Analysis>)

## **Publication details**

<dl>

<dt>Authors</dt>
<dd>E. F. Sarmento; C. Tsallis</dd>

<dt>Type</dt>
<dd>Physics Note</dd>

<dt>Status</dt>
<dd>Published</dd>

<dt>Publication date</dt>
<dd>1985</dd>

<dt>Description</dt>
<dd>The renomarlization group techniques are applied, for the first time, to surface magnetism in bulk magnets, ''for all signs'' of surface and bulk coupling constants. The q-state Potts model is specifically focused, and a interesting q-evolution of the phase diagram is exhibited. In particular the Ising model (q=2) presents a remarkable feature: surface ferro (or antiferro) magnetism can disappear while heating an antiferro (or ferro) magnet, and ''reappear again'' for higher temperatures, before entering in the paramagnetic phases.</dd>

<dt>Year</dt>
<dd>1985</dd>

<dt>Number</dt>
<dd>CBPF-NF-005/85</dd>

<dt>Linked to a thesis</dt>
<dd>No</dd>

<dt>Linked to a grant</dt>
<dd>No</dd>

</dl>

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```

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