The effect of proton irradiation on magnetic properties of lithium ferrites
The effect of proton irradiation on magnetic properties of lithium ferrites has been investigated with x-ray diffraction (XRD), magnetization, and Mössbauer spectroscopy measurements. Li 0.5 Fe 2.5 O 4 powders have been fabricated by the sol-gel method. Following the annealing at 700 ° C , these sam...
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| Veröffentlicht in: | Journal of applied physics 2009-04, Vol.105 (7), p.07A506-07A506-3 |
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| creator | Hyun, Sung Wook Kouh, Taejoon Kim, Sam Jin Kim, Chul Sung |
| description | The effect of proton irradiation on magnetic properties of lithium ferrites has been investigated with x-ray diffraction (XRD), magnetization, and Mössbauer spectroscopy measurements.
Li
0.5
Fe
2.5
O
4
powders have been fabricated by the sol-gel method. Following the annealing at
700
°
C
, these samples have been proton irradiated with 1, 5, and
10
pC
/
μ
m
2
. The analysis of XRD patterns by Rietveld refinement method shows that these samples have ordered cubic spinel structures with space group of
P
4
3
32
. We have observed that the corresponding lattice constant
a
0
linearly increases from 8.3301 to
8.3314
±
0.0001
Å
with increasing proton irradiation. Compared to nonirradiated sample, which has the saturation magnetization
(
M
s
)
of 66.4 emu/g and oxygen occupancy of 3.9980 at room temperature, the values of magnetization and oxygen occupancy at room temperature are 66.0, 62.6, and 60.8 emu/g and 3.9840, 3.9452, and 3.9272, respectively, for 1, 5, and
10
pC
/
μ
m
2
irradiated powders. Also, the coercivity
(
H
c
)
decreases from 175.6 to 154.0 Oe with increasing proton irradiation. The Mössbauer spectra taken at room temperature show that the values of isomer shift
(
δ
)
for the tetrahedral
(
A
)
and octahedral
(
B
)
sites are consistent with the
Fe
3
+
valence state. The results suggest that the proton irradiation induces the oxygen vacancy defects, which in turn leads to the changes in magnetic properties. |
| doi_str_mv | 10.1063/1.3070611 |
| format | Article |
| fullrecord | <record><control><sourceid>scitation_osti_</sourceid><recordid>TN_cdi_osti_scitechconnect_21190133</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>jap</sourcerecordid><originalsourceid>FETCH-LOGICAL-c312t-18e4e57c3bea7c39a85bb9216c66769ff98ada719695314cf1a4288e7edb61dc3</originalsourceid><addsrcrecordid>eNp1kE1LAzEURYMoWKsL_8GAKxdT8yadfGwEKX5hwU1dh0zmxUbaSUniwn9vxulWCMmDHO7jHkKugS6AcnYHC0YF5QAnZAZUqlq0LT0lM0obqKUS6pxcpPRFKYBkakbeNlus0Dm0uQquOsSQw1D5GE3vTfZlLmdvPgfM3o7fB4zZYxrhnc9b_72vHMboM6ZLcubMLuHV8Z2Tj6fHzeqlXr8_v64e1rVl0OQaJC6xFZZ1aMqtjGy7TjXALeeCK-eUNL0RoLhqGSytA7NspESBfceht2xObqbckLLXyZbddmvDMJQSugFQFBgr1O1E2RhSiuj0Ifq9iT8aqB5dadBHV4W9n9gx7K_2_3ARpidhOoyZozD2C_zjcSU</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>The effect of proton irradiation on magnetic properties of lithium ferrites</title><source>AIP Journals Complete</source><source>AIP Digital Archive</source><source>Alma/SFX Local Collection</source><creator>Hyun, Sung Wook ; Kouh, Taejoon ; Kim, Sam Jin ; Kim, Chul Sung</creator><creatorcontrib>Hyun, Sung Wook ; Kouh, Taejoon ; Kim, Sam Jin ; Kim, Chul Sung</creatorcontrib><description>The effect of proton irradiation on magnetic properties of lithium ferrites has been investigated with x-ray diffraction (XRD), magnetization, and Mössbauer spectroscopy measurements.
Li
0.5
Fe
2.5
O
4
powders have been fabricated by the sol-gel method. Following the annealing at
700
°
C
, these samples have been proton irradiated with 1, 5, and
10
pC
/
μ
m
2
. The analysis of XRD patterns by Rietveld refinement method shows that these samples have ordered cubic spinel structures with space group of
P
4
3
32
. We have observed that the corresponding lattice constant
a
0
linearly increases from 8.3301 to
8.3314
±
0.0001
Å
with increasing proton irradiation. Compared to nonirradiated sample, which has the saturation magnetization
(
M
s
)
of 66.4 emu/g and oxygen occupancy of 3.9980 at room temperature, the values of magnetization and oxygen occupancy at room temperature are 66.0, 62.6, and 60.8 emu/g and 3.9840, 3.9452, and 3.9272, respectively, for 1, 5, and
10
pC
/
μ
m
2
irradiated powders. Also, the coercivity
(
H
c
)
decreases from 175.6 to 154.0 Oe with increasing proton irradiation. The Mössbauer spectra taken at room temperature show that the values of isomer shift
(
δ
)
for the tetrahedral
(
A
)
and octahedral
(
B
)
sites are consistent with the
Fe
3
+
valence state. The results suggest that the proton irradiation induces the oxygen vacancy defects, which in turn leads to the changes in magnetic properties.</description><identifier>ISSN: 0021-8979</identifier><identifier>EISSN: 1089-7550</identifier><identifier>DOI: 10.1063/1.3070611</identifier><identifier>CODEN: JAPIAU</identifier><language>eng</language><publisher>United States: American Institute of Physics</publisher><subject>ANNEALING ; COERCIVE FORCE ; CRYSTALS ; FERRITES ; IRON IONS ; IRRADIATION ; ISOMER SHIFT ; LATTICE PARAMETERS ; LITHIUM COMPOUNDS ; MAGNETIC PROPERTIES ; MAGNETIZATION ; MATERIALS SCIENCE ; MOESSBAUER EFFECT ; OXYGEN ; PROTONS ; SOL-GEL PROCESS ; SPACE GROUPS ; SPINELS ; TEMPERATURE RANGE 0273-0400 K ; VACANCIES ; X-RAY DIFFRACTION</subject><ispartof>Journal of applied physics, 2009-04, Vol.105 (7), p.07A506-07A506-3</ispartof><rights>2009 American Institute of Physics</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c312t-18e4e57c3bea7c39a85bb9216c66769ff98ada719695314cf1a4288e7edb61dc3</citedby><cites>FETCH-LOGICAL-c312t-18e4e57c3bea7c39a85bb9216c66769ff98ada719695314cf1a4288e7edb61dc3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://pubs.aip.org/jap/article-lookup/doi/10.1063/1.3070611$$EHTML$$P50$$Gscitation$$H</linktohtml><link.rule.ids>230,314,776,780,790,881,1553,4498,27901,27902,76126,76132</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/21190133$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Hyun, Sung Wook</creatorcontrib><creatorcontrib>Kouh, Taejoon</creatorcontrib><creatorcontrib>Kim, Sam Jin</creatorcontrib><creatorcontrib>Kim, Chul Sung</creatorcontrib><title>The effect of proton irradiation on magnetic properties of lithium ferrites</title><title>Journal of applied physics</title><description>The effect of proton irradiation on magnetic properties of lithium ferrites has been investigated with x-ray diffraction (XRD), magnetization, and Mössbauer spectroscopy measurements.
Li
0.5
Fe
2.5
O
4
powders have been fabricated by the sol-gel method. Following the annealing at
700
°
C
, these samples have been proton irradiated with 1, 5, and
10
pC
/
μ
m
2
. The analysis of XRD patterns by Rietveld refinement method shows that these samples have ordered cubic spinel structures with space group of
P
4
3
32
. We have observed that the corresponding lattice constant
a
0
linearly increases from 8.3301 to
8.3314
±
0.0001
Å
with increasing proton irradiation. Compared to nonirradiated sample, which has the saturation magnetization
(
M
s
)
of 66.4 emu/g and oxygen occupancy of 3.9980 at room temperature, the values of magnetization and oxygen occupancy at room temperature are 66.0, 62.6, and 60.8 emu/g and 3.9840, 3.9452, and 3.9272, respectively, for 1, 5, and
10
pC
/
μ
m
2
irradiated powders. Also, the coercivity
(
H
c
)
decreases from 175.6 to 154.0 Oe with increasing proton irradiation. The Mössbauer spectra taken at room temperature show that the values of isomer shift
(
δ
)
for the tetrahedral
(
A
)
and octahedral
(
B
)
sites are consistent with the
Fe
3
+
valence state. The results suggest that the proton irradiation induces the oxygen vacancy defects, which in turn leads to the changes in magnetic properties.</description><subject>ANNEALING</subject><subject>COERCIVE FORCE</subject><subject>CRYSTALS</subject><subject>FERRITES</subject><subject>IRON IONS</subject><subject>IRRADIATION</subject><subject>ISOMER SHIFT</subject><subject>LATTICE PARAMETERS</subject><subject>LITHIUM COMPOUNDS</subject><subject>MAGNETIC PROPERTIES</subject><subject>MAGNETIZATION</subject><subject>MATERIALS SCIENCE</subject><subject>MOESSBAUER EFFECT</subject><subject>OXYGEN</subject><subject>PROTONS</subject><subject>SOL-GEL PROCESS</subject><subject>SPACE GROUPS</subject><subject>SPINELS</subject><subject>TEMPERATURE RANGE 0273-0400 K</subject><subject>VACANCIES</subject><subject>X-RAY DIFFRACTION</subject><issn>0021-8979</issn><issn>1089-7550</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><recordid>eNp1kE1LAzEURYMoWKsL_8GAKxdT8yadfGwEKX5hwU1dh0zmxUbaSUniwn9vxulWCMmDHO7jHkKugS6AcnYHC0YF5QAnZAZUqlq0LT0lM0obqKUS6pxcpPRFKYBkakbeNlus0Dm0uQquOsSQw1D5GE3vTfZlLmdvPgfM3o7fB4zZYxrhnc9b_72vHMboM6ZLcubMLuHV8Z2Tj6fHzeqlXr8_v64e1rVl0OQaJC6xFZZ1aMqtjGy7TjXALeeCK-eUNL0RoLhqGSytA7NspESBfceht2xObqbckLLXyZbddmvDMJQSugFQFBgr1O1E2RhSiuj0Ifq9iT8aqB5dadBHV4W9n9gx7K_2_3ARpidhOoyZozD2C_zjcSU</recordid><startdate>20090401</startdate><enddate>20090401</enddate><creator>Hyun, Sung Wook</creator><creator>Kouh, Taejoon</creator><creator>Kim, Sam Jin</creator><creator>Kim, Chul Sung</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>20090401</creationdate><title>The effect of proton irradiation on magnetic properties of lithium ferrites</title><author>Hyun, Sung Wook ; Kouh, Taejoon ; Kim, Sam Jin ; Kim, Chul Sung</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c312t-18e4e57c3bea7c39a85bb9216c66769ff98ada719695314cf1a4288e7edb61dc3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>ANNEALING</topic><topic>COERCIVE FORCE</topic><topic>CRYSTALS</topic><topic>FERRITES</topic><topic>IRON IONS</topic><topic>IRRADIATION</topic><topic>ISOMER SHIFT</topic><topic>LATTICE PARAMETERS</topic><topic>LITHIUM COMPOUNDS</topic><topic>MAGNETIC PROPERTIES</topic><topic>MAGNETIZATION</topic><topic>MATERIALS SCIENCE</topic><topic>MOESSBAUER EFFECT</topic><topic>OXYGEN</topic><topic>PROTONS</topic><topic>SOL-GEL PROCESS</topic><topic>SPACE GROUPS</topic><topic>SPINELS</topic><topic>TEMPERATURE RANGE 0273-0400 K</topic><topic>VACANCIES</topic><topic>X-RAY DIFFRACTION</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hyun, Sung Wook</creatorcontrib><creatorcontrib>Kouh, Taejoon</creatorcontrib><creatorcontrib>Kim, Sam Jin</creatorcontrib><creatorcontrib>Kim, Chul Sung</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Journal of applied physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hyun, Sung Wook</au><au>Kouh, Taejoon</au><au>Kim, Sam Jin</au><au>Kim, Chul Sung</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The effect of proton irradiation on magnetic properties of lithium ferrites</atitle><jtitle>Journal of applied physics</jtitle><date>2009-04-01</date><risdate>2009</risdate><volume>105</volume><issue>7</issue><spage>07A506</spage><epage>07A506-3</epage><pages>07A506-07A506-3</pages><issn>0021-8979</issn><eissn>1089-7550</eissn><coden>JAPIAU</coden><abstract>The effect of proton irradiation on magnetic properties of lithium ferrites has been investigated with x-ray diffraction (XRD), magnetization, and Mössbauer spectroscopy measurements.
Li
0.5
Fe
2.5
O
4
powders have been fabricated by the sol-gel method. Following the annealing at
700
°
C
, these samples have been proton irradiated with 1, 5, and
10
pC
/
μ
m
2
. The analysis of XRD patterns by Rietveld refinement method shows that these samples have ordered cubic spinel structures with space group of
P
4
3
32
. We have observed that the corresponding lattice constant
a
0
linearly increases from 8.3301 to
8.3314
±
0.0001
Å
with increasing proton irradiation. Compared to nonirradiated sample, which has the saturation magnetization
(
M
s
)
of 66.4 emu/g and oxygen occupancy of 3.9980 at room temperature, the values of magnetization and oxygen occupancy at room temperature are 66.0, 62.6, and 60.8 emu/g and 3.9840, 3.9452, and 3.9272, respectively, for 1, 5, and
10
pC
/
μ
m
2
irradiated powders. Also, the coercivity
(
H
c
)
decreases from 175.6 to 154.0 Oe with increasing proton irradiation. The Mössbauer spectra taken at room temperature show that the values of isomer shift
(
δ
)
for the tetrahedral
(
A
)
and octahedral
(
B
)
sites are consistent with the
Fe
3
+
valence state. The results suggest that the proton irradiation induces the oxygen vacancy defects, which in turn leads to the changes in magnetic properties.</abstract><cop>United States</cop><pub>American Institute of Physics</pub><doi>10.1063/1.3070611</doi></addata></record> |
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| language | eng |
| recordid | cdi_osti_scitechconnect_21190133 |
| source | AIP Journals Complete; AIP Digital Archive; Alma/SFX Local Collection |
| subjects | ANNEALING COERCIVE FORCE CRYSTALS FERRITES IRON IONS IRRADIATION ISOMER SHIFT LATTICE PARAMETERS LITHIUM COMPOUNDS MAGNETIC PROPERTIES MAGNETIZATION MATERIALS SCIENCE MOESSBAUER EFFECT OXYGEN PROTONS SOL-GEL PROCESS SPACE GROUPS SPINELS TEMPERATURE RANGE 0273-0400 K VACANCIES X-RAY DIFFRACTION |
| title | The effect of proton irradiation on magnetic properties of lithium ferrites |
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