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Spin-wave excitations in epitaxial ultrathin FeCo with zero magnetocrystalline anisotropy
Spin-wave theory predicts reduced thermal spin-wave excitations due to a magnetic anisotropy. Recent results show that a strong uniaxial in-plane anisotropy in ultrathin Fe ∕ GaAs ( 001 ) films indeed stabilizes the ferromagnetic order versus thermal spin excitations [ Kipferl , J. Appl. Phys. 97 ,...
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| Published in: | Journal of applied physics 2006-04, Vol.99 (8), p.08J703-08J703-3 |
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| Main Authors: | , , , |
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| Language: | English |
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| container_end_page | 08J703-3 |
| container_issue | 8 |
| container_start_page | 08J703 |
| container_title | Journal of applied physics |
| container_volume | 99 |
| creator | Sperl, M. Kipferl, W. Dumm, M. Bayreuther, G. |
| description | Spin-wave theory predicts reduced thermal spin-wave excitations due to a magnetic anisotropy. Recent results show that a strong uniaxial in-plane anisotropy in ultrathin
Fe
∕
GaAs
(
001
)
films indeed stabilizes the ferromagnetic order versus thermal spin excitations [
Kipferl
,
J. Appl. Phys.
97
,
10B313
(
2005
)
]. In order to study whether a fourth-order in-plane anisotropy has a similar effect epitaxial
Fe
70
Co
30
∕
Au
(
001
)
samples with zero magnetocrystalline anisotropy were studied and compared to results for
Fe
∕
Au
(
001
)
. The temperature dependence of the spontaneous magnetization
M
S
for
T
<
0.5
T
c
can be well described by the
Bloch
[
Z. Phys.
61
,
206
(
1930
)]
T
3
∕
2
law in the entire thickness range. However, for each thickness
B
is reduced in
Fe
70
Co
30
∕
Au
(
001
)
compared to
Fe
∕
Au
(
001
)
films despite the reduced anisotropy. This means that the effect of a weak in-plane anisotropy is overcompensated by the enhanced exchange interaction. |
| doi_str_mv | 10.1063/1.2167329 |
| format | article |
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Fe
∕
GaAs
(
001
)
films indeed stabilizes the ferromagnetic order versus thermal spin excitations [
Kipferl
,
J. Appl. Phys.
97
,
10B313
(
2005
)
]. In order to study whether a fourth-order in-plane anisotropy has a similar effect epitaxial
Fe
70
Co
30
∕
Au
(
001
)
samples with zero magnetocrystalline anisotropy were studied and compared to results for
Fe
∕
Au
(
001
)
. The temperature dependence of the spontaneous magnetization
M
S
for
T
<
0.5
T
c
can be well described by the
Bloch
[
Z. Phys.
61
,
206
(
1930
)]
T
3
∕
2
law in the entire thickness range. However, for each thickness
B
is reduced in
Fe
70
Co
30
∕
Au
(
001
)
compared to
Fe
∕
Au
(
001
)
films despite the reduced anisotropy. This means that the effect of a weak in-plane anisotropy is overcompensated by the enhanced exchange interaction.</description><identifier>ISSN: 0021-8979</identifier><identifier>EISSN: 1089-7550</identifier><identifier>DOI: 10.1063/1.2167329</identifier><identifier>CODEN: JAPIAU</identifier><language>eng</language><publisher>American Institute of Physics</publisher><ispartof>Journal of applied physics, 2006-04, Vol.99 (8), p.08J703-08J703-3</ispartof><rights>2006 American Institute of Physics</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c319t-8cc51218a39f39a7d4c5024384b458913dba9f0eecc7161c47ab94641a1a71b33</citedby><cites>FETCH-LOGICAL-c319t-8cc51218a39f39a7d4c5024384b458913dba9f0eecc7161c47ab94641a1a71b33</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Sperl, M.</creatorcontrib><creatorcontrib>Kipferl, W.</creatorcontrib><creatorcontrib>Dumm, M.</creatorcontrib><creatorcontrib>Bayreuther, G.</creatorcontrib><title>Spin-wave excitations in epitaxial ultrathin FeCo with zero magnetocrystalline anisotropy</title><title>Journal of applied physics</title><description>Spin-wave theory predicts reduced thermal spin-wave excitations due to a magnetic anisotropy. Recent results show that a strong uniaxial in-plane anisotropy in ultrathin
Fe
∕
GaAs
(
001
)
films indeed stabilizes the ferromagnetic order versus thermal spin excitations [
Kipferl
,
J. Appl. Phys.
97
,
10B313
(
2005
)
]. In order to study whether a fourth-order in-plane anisotropy has a similar effect epitaxial
Fe
70
Co
30
∕
Au
(
001
)
samples with zero magnetocrystalline anisotropy were studied and compared to results for
Fe
∕
Au
(
001
)
. The temperature dependence of the spontaneous magnetization
M
S
for
T
<
0.5
T
c
can be well described by the
Bloch
[
Z. Phys.
61
,
206
(
1930
)]
T
3
∕
2
law in the entire thickness range. However, for each thickness
B
is reduced in
Fe
70
Co
30
∕
Au
(
001
)
compared to
Fe
∕
Au
(
001
)
films despite the reduced anisotropy. This means that the effect of a weak in-plane anisotropy is overcompensated by the enhanced exchange interaction.</description><issn>0021-8979</issn><issn>1089-7550</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><recordid>eNp1kMFKAzEURYMoWKsL_yBbF1PzJplJshGkWBUKLtSFq_AmzdjIdGZIom39eju04srV4z4OF-4h5BLYBFjJr2GSQyl5ro_ICJjSmSwKdkxGjOWQKS31KTmL8YMxAMX1iLw9977N1vjlqNtYnzD5ro3Ut9T1u7Tx2NDPJgVMy91v5qYdXfu0pN8udHSF761LnQ3bmLBpfOsotj52KXT99pyc1NhEd3G4Y_I6u3uZPmTzp_vH6e08sxx0ypS1BeSgkOuaa5QLYQuWC65EJQqlgS8q1DVzzloJJVghsdKiFICAEirOx-Rq32tDF2NwtemDX2HYGmBmcGLAHJzs2Js9G3-n_g8PYswgxvyJ4T9A82ro</recordid><startdate>20060415</startdate><enddate>20060415</enddate><creator>Sperl, M.</creator><creator>Kipferl, W.</creator><creator>Dumm, M.</creator><creator>Bayreuther, G.</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20060415</creationdate><title>Spin-wave excitations in epitaxial ultrathin FeCo with zero magnetocrystalline anisotropy</title><author>Sperl, M. ; Kipferl, W. ; Dumm, M. ; Bayreuther, G.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c319t-8cc51218a39f39a7d4c5024384b458913dba9f0eecc7161c47ab94641a1a71b33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sperl, M.</creatorcontrib><creatorcontrib>Kipferl, W.</creatorcontrib><creatorcontrib>Dumm, M.</creatorcontrib><creatorcontrib>Bayreuther, G.</creatorcontrib><collection>CrossRef</collection><jtitle>Journal of applied physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sperl, M.</au><au>Kipferl, W.</au><au>Dumm, M.</au><au>Bayreuther, G.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Spin-wave excitations in epitaxial ultrathin FeCo with zero magnetocrystalline anisotropy</atitle><jtitle>Journal of applied physics</jtitle><date>2006-04-15</date><risdate>2006</risdate><volume>99</volume><issue>8</issue><spage>08J703</spage><epage>08J703-3</epage><pages>08J703-08J703-3</pages><issn>0021-8979</issn><eissn>1089-7550</eissn><coden>JAPIAU</coden><abstract>Spin-wave theory predicts reduced thermal spin-wave excitations due to a magnetic anisotropy. Recent results show that a strong uniaxial in-plane anisotropy in ultrathin
Fe
∕
GaAs
(
001
)
films indeed stabilizes the ferromagnetic order versus thermal spin excitations [
Kipferl
,
J. Appl. Phys.
97
,
10B313
(
2005
)
]. In order to study whether a fourth-order in-plane anisotropy has a similar effect epitaxial
Fe
70
Co
30
∕
Au
(
001
)
samples with zero magnetocrystalline anisotropy were studied and compared to results for
Fe
∕
Au
(
001
)
. The temperature dependence of the spontaneous magnetization
M
S
for
T
<
0.5
T
c
can be well described by the
Bloch
[
Z. Phys.
61
,
206
(
1930
)]
T
3
∕
2
law in the entire thickness range. However, for each thickness
B
is reduced in
Fe
70
Co
30
∕
Au
(
001
)
compared to
Fe
∕
Au
(
001
)
films despite the reduced anisotropy. This means that the effect of a weak in-plane anisotropy is overcompensated by the enhanced exchange interaction.</abstract><pub>American Institute of Physics</pub><doi>10.1063/1.2167329</doi><oa>free_for_read</oa></addata></record> |
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| issn | 0021-8979 1089-7550 |
| language | eng |
| recordid | cdi_crossref_primary_10_1063_1_2167329 |
| source | American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list) |
| title | Spin-wave excitations in epitaxial ultrathin FeCo with zero magnetocrystalline anisotropy |
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