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Habilitation Thesis
DOI
10.11606/T.43.2016.tde-24092015-142443
Document
Author
Full name
Valdir Bindilatti
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 1994
Committee
Oliveira Junior, Nei Fernandes de (President)
Continentino, Mucio Amado
Ioriatti Júnior, Lidério Citrângulo
Lerner, Gilberto
Salinas, Silvio Roberto de Azevedo
Title in Portuguese
Espectroscopia de interações de exchange por degraus de magnetização em semicondutores magnéticos diluidos
Keywords in Portuguese
Espectroscopia
Matéria condensada
Abstract in Portuguese
Apresentamos resultados de interacoes de exchange por degraus de magnetizacao em ultra-baixas temperaturas aplicada a alguns semicondutores magneticos diluidos contendo ’MN’, ’CO’ e ’EU’. Nossos resultados incluem a primeira determinacao direta das constantes de interacao entre segundos vizinhos no ’ZN IND. 1-X’’MN IND. X’s (’J IND. 2’/’K IND. B’=-0,42’+ OU -’0,01 k) e no ’PB IND. 1-X’’EU IND. X’ ’SE’ (’J IND. 2’/’K IND. B’=-0,251’+ OU -’0,004 k). Para o ’CD IND. 1-X’’CO IND.X’s uma constante de exchange foi medida (’J/K IND. B’=-1,2’+ OU -’0,1 k) mas a sua atribuicao a interacoes entre segundos ou terceiros vizinhos nao foi possivel, dependendo de novas investigacoes. Alem disso, um novo valor para a constante de anisotropia de ion unico em outro material, ’CD IND. 1-X’’CO IND. X’’SE’, foi estabelecido (’D/K IND. B’=0,673’+ OU -’0,005 k)
Title in English
Spectroscopy exchange interactions magnetization steps in dilute magnetic semiconductors
Keywords in English
Condensed matther
Spectroscopy
Abstract in English
We present results of interactions of exchange by magnetization steps in ultra-low temperatures applied to some diluted magnetic semiconductor containing 'MN', 'CO' and 'I'. Our results include the first direct determination of the constant interaction between neighboring seconds' ZN IND. 1-X''MN IND. X's ('J IND 2.' / 'K IND B.' = - 0.42 '+ OU -'0,01 k) and' PB IND. 1-X''EU IND. X '' SE '(' J IND 2. '/' K IND B. '= - 0.251' + OU -'0,004 k). For the 'IND CD. 1-X''CO IND.X's one constant exchange was measured ('J / K IND B.' = - 1.2 '+ OU -'0,1 k) but its attribution to interactions between second or third neighbors it was not possible, depending on new investigations. Furthermore, a new value for the anisotropy constant of at another single ion material 'IND CD. 1-X''CO IND. X''SE 'has been established (' D / K IND. B '= 0.673' + k -'0,005 OR)
 
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Publishing Date
2016-04-08
 
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