%0 Journal Article %1 WOS:000076517200013 %A Costa, RN %A Costa, UMS %A Cottam, MG %C PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS %D 1998 %I ELSEVIER SCIENCE BV %J JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS %K - Green's Ising function; impurities; magnetism} model spin surface transverse; waves; {ferromagnets; %N 2 %P 234-240 %R 10.1016/S0304-8853(98)00224-8 %T Localised magnetic impurity states in a transverse Ising ferromagnet: bulk and surface effects %V 189 %X A Green's function formalism is used to calculate the localised states associated with a magnetic impurity in a ferromagnet described by the transverse Ising model. We consider both the cases of an infinite medium with an impurity and a semi-infinite medium with an impurity in the Nth layer (N = 1, 2...) from the free surface. The non-resonant excitations of the system due to the impurity (i.e., the `defect modes' outside the region of the bulk and surface spin waves) are calculated numerically for the high-temperature phase. Three situations are analysed, depending on the position of the impurity site: the impurity is in the surface (N = 1), the impurity is just below the surface (N = 2) and the impurity is in the bulk region (N greater than or equal to 3). (C) 1998 Elsevier Science B.V. All rights reserved.

@article{WOS:000076517200013, abstract = {A Green's function formalism is used to calculate the localised states associated with a magnetic impurity in a ferromagnet described by the transverse Ising model. We consider both the cases of an infinite medium with an impurity and a semi-infinite medium with an impurity in the Nth layer (N = 1, 2...) from the free surface. The non-resonant excitations of the system due to the impurity (i.e., the `defect modes' outside the region of the bulk and surface spin waves) are calculated numerically for the high-temperature phase. Three situations are analysed, depending on the position of the impurity site: the impurity is in the surface (N = 1), the impurity is just below the surface (N = 2) and the impurity is in the bulk region (N greater than or equal to 3). (C) 1998 Elsevier Science B.V. All rights reserved.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, author = {Costa, RN and Costa, UMS and Cottam, MG}, biburl = {https://www.bibsonomy.org/bibtex/2516c79df19c20171ee04316b8bee175e/ppgfis_ufc_br}, doi = {10.1016/S0304-8853(98)00224-8}, interhash = {3644f38499dca80d1d8ff5d79a0e1018}, intrahash = {516c79df19c20171ee04316b8bee175e}, issn = {0304-8853}, journal = {JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS}, keywords = {- Green's Ising function; impurities; magnetism} model spin surface transverse; waves; {ferromagnets;}, number = 2, pages = {234-240}, publisher = {ELSEVIER SCIENCE BV}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Localised magnetic impurity states in a transverse Ising ferromagnet: bulk and surface effects}, tppubtype = {article}, volume = 189, year = 1998 }